Van Heurck -- Synopsis des Diatomées de Belgique -- Index
| Synedra | acicularis Kütz. = Nitzschia acicularis (Kütz.) W.Sm. | Page -- | Plate 70 | Figure 6 | |
| Synedra | acicularis W.Sm. = Synedra pulchella var. smithii Ralfs | Page 150 | Plate 41 | Figure 2 | |
| Synedra | acula Kütz. = Synedra acus var. acula (Kütz.) Grunow | Page -- | Plate 39 | Figure 3 | Note 228 |
| Synedra | acus Kütz. | Page 151 | Plate 39 | Figure 4[a] | Note 229 |
| Synedra | acus var. [Grunow] | Page -- | Plate 39 | Figure 4bcd | |
| Synedra | acus var. acula (Kütz.) Grunow | Page -- | Plate 39 | Figure 3 | |
| Synedra | acus var. angustissima Grunow | Page 151 | Plate 39 | Figure 10 | |
| Synedra | acus var. delicatissima (W.Sm.) Grunow | Page 151 | Plate 39 | Figure 7 | |
| Synedra | acus var. fossilis Grunow | Page -- | Plate 39 | Figure 5 | |
| Synedra | affinis Kütz. | Page 153 | Plate 41 | Figure 13 | |
| Synedra | affinis var. acuminata Grunow | Page -- | Plate 41 | Figure 14 | |
| Synedra | affinis var. arcus [f.] genuina Grunow | Page -- | Plate 41 | Figure 11 | |
| Synedra | affinis var. delicatula Grunow | Page -- | Plate 41 | Figure 16 | |
| Synedra | affinis var. dubia Grunow | Page -- | Plate 41 | Figure 20 | |
| Synedra | affinis var. fasciculata (Kütz.) Grunow | Page 153 | Plate 41 | Figure 15[ab] | |
| Synedra | affinis [var.] genuina f. parva Van Heurck = Synedra affinis Kütz. | Page -- | Plate 41 | Figure 13 | |
| Synedra | affinis var. gracilis Grunow | Page -- | Plate 41 | Figure 15c | |
| Synedra | affinis var. hybrida f. breviores Van Heurck | Page -- | Plate 41 | Figure 10 | |
| Synedra | affinis var. hybrida f. elongata Van Heurck | Page -- | Plate 41 | Figure 9b | |
| Synedra | affinis var. intermedia Grunow | Page -- | Plate 41 | Figure 21 | |
| Synedra | affinis var. ? lancettula Grunow | Page -- | Plate 41 | Figure [28] | Note 230 |
| Synedra | affinis var. ? lepida Grunow | Page -- | Plate 41 | Figure 25 | |
| Synedra | affinis var. obtusa Arn. | Page -- | Plate 41 | Figure 12 | |
| Synedra | affinis var. obtusa f. gracilior Van Heurck | Page -- | Plate 41 | Figure 19 | |
| Synedra | affinis var. parva (Kütz.) Grunow | Page 153 | Plate 41 | Figure 23 | |
| Synedra | affinis var. ? rupicola Grunow | Page -- | Plate 41 | Figure [27] | Note 231 |
| Synedra | affinis var. subtilis Grunow | Page -- | Plate 41 | Figure 18 | |
| Synedra | affinis var. tabulata (Kütz.) Van Heurck | Page 153 | Plate 41 | Figure 9a | |
| Synedra | affinis var. tabulata f. curta, acuminata Van Heurck = Synedra affinis var. tabulata (Kütz.) Van Heurck | Page -- | Plate 41 | Figure 9a | |
| Synedra | affinis var. tenuis Grunow | Page -- | Plate 41 | Figure 17 | |
| Synedra | alpina Nägeli = Eunotia lunaris val alpina ( Nägeli) Grunow | Page -- | Plate 35 | Figure 5 | |
| Synedra | amphicephala H.L.Sm. = Synedra delicatissima var. amphicephala Van Heurck | Page -- | Plate 39 | Figure 8 | |
| Synedra | amphicephala Kütz. | Page 153 | Plate 39 | Figure 14 | |
| Synedra | amphicephala var. ? austriaca Grunow | Page -- | Plate 39 | Figure 16ab | |
| Synedra | amphicephala var. ? [Grunow] | Page -- | Plate 39 | Figure 15 | Note 232 |
| Synedra | amphicephala var. ?? fallax Grunow | Page -- | Plate 39 | Figure 16c | |
| Synedra | amphirhynchus Ehrenb. = Synedra ulna var. amphirhynchus (Ehrenb.) Grunow | Page 151 | Plate 38 | Figure 5 | |
| Synedra | arcus [f.] genuina Grunow = Synedra affinis var. arcus [f.] genuina Grunow | Page -- | Plate 41 | Figure 11 | |
| Synedra | arcus β minor Grunow = Campylosira cymbelliformis (A.W.F.Schmidt) Grunow | Page 158 | Plate 45 | Figure 43 | |
| Synedra | armoricana Kütz. = Nitzschia sigmoidea var. ? armoricana (Kütz.) Grunow | Page -- | Plate 63 | Figure 8 | |
| Synedra | austriaca Grunow = Synedra amphicephala var. ? austriaca Grunow | Page -- | Plate 39 | Figure 16ab | |
| Synedra | baculus W.Greg. | Page -- | Plate 42 | Figure 9 | |
| Synedra | barbatula Kütz. | Page 152 | Plate 40 | Figure 6abcd | |
| Synedra | biasolettiana Kütz. ? = Achnanthes biasolettiana (Kütz.) Grunow | Page -- | Plate 27 | Figure 27,28 | |
| Synedra | biceps W.Sm. = Eunotia flexuosa var. bicapitata Grunow | Page 145 | Plate 35 | Figure 11 | |
| Synedra | bicurvata Biene = Synedra ulna var. bicurvata (Biene) Grunow | Page -- | Plate 38 | Figure 8 | |
| Synedra | bilunaris Ehrenb. = Eunotia lunaris var. bilunaris (Ehrenb.) Grunow | Page -- | Plate 35 | Figure 6b | |
| Synedra | capensis Grunow | Page -- | Plate 42 | Figure 1 | |
| Synedra | capitata Ehrenb. | Page 152 | Plate 38 | Figure 1 | |
| Synedra | capitellata Grunow | Page -- | Plate 40 | Figure 26[a] | |
| Synedra | capitellata f. striis distantioribus Van Heurck | Page -- | Plate 40 | Figure 26bc | |
| Synedra | capitellata var. cymbelloides Grunow | Page -- | Plate 40 | Figure 24,25 | |
| Synedra | closterioides Grunow | Page -- | Plate 70 | Figure 10,11 | |
| Synedra | commutata var. producta Van Heurck | Page -- | Plate 40 | Figure 4 | |
| Synedra | commutata var. septentrionalis Grunow | Page -- | Plate 40 | Figure 5 | |
| Synedra | constricta Kütz.= Nitzschia apiculata (W.Greg.) Grunow | Page -- | Plate 58 | Figure 26,27 | |
| Synedra | crotonensis var. prolongata f. belgica Grunow = Fragilaria crotonensis var. prolongata Grunow | Page -- | Plate 40 | Figure 10 | |
| Synedra | crystallina (Lyngb.) Kütz. | Page 153 | Plate 42 | Figure 10 | |
| Synedra | crystallina var. smithii Grunow = Synedra crystallina (Lyngb.) Kütz. | Page -- | Plate 42 | Figure 10 | |
| Synedra | cymbelliformis A.W.F.Schmidt = Campylosira cymbelliformis (A.W.F.Schmidt) Grunow | Page -- | Plate 45 | Figure 43 | |
| Synedra | dalmatica Kütz. ? = Synedra fulgens var. dalmatica (Kütz.) Grunow | Page -- | Plate 43 | Figure 5 | |
| Synedra | danica Kütz. = Synedra ulna var. danica (Kütz.) Grunow | Page 151 | Plate 38 | Figure 14a | |
| Synedra | debilis Kütz = Nitzschia palea var. debilis (Kütz.) Grunow | Page -- | Plate 69 | Figure 28,29 | |
| Synedra | decipiens Cleve et Grunow | Page -- | Plate 42 | Figure 4 | |
| Synedra | deformis f. perminuta [?] = Synedra capitellata var. cymbelloides Grunow | Page -- | Plate 40 | Figure 24,25 | Note 233 |
| Synedra | delicatissima W.Sm. = Synedra acus var. delicatissima (W.Sm.) Grunow | Page 151 | Plate 39 | Figure 7 | |
| Synedra | delicatissima f. brevis Van Heurck | Page -- | Plate 39 | Figure 9 | |
| Synedra | delicatissima var. amphicephala Van Heurck | Page -- | Plate 39 | Figure 8 | |
| Synedra | delicatissima var. angustissima Grunow = Synedra acus var. angustissima Grunow | Page -- | Plate 39 | Figure 10 | |
| Synedra | delicatissima var. mesoleia Grunow | Page -- | Plate 39 | Figure 6 | |
| Synedra | demerarae Grunow | Page -- | Plate 41 | Figure [29] | Note 234 |
| Synedra | dissipata Kütz. = Nitzschia dissipata (Kütz.) Grunow | Page -- | Plate 63 | Figure 1 | |
| Synedra | dubia Grunow = Synedra affinis var. dubia Grunow | Page -- | Plate 41 | Figure 20 | |
| Synedra | falcata Bréb. = Eunotia lunaris var. excisa Grunow | Page -- | Plate 35 | Figure 6c | |
| Synedra | fallax Grunow = Synedra amphicephala var. ?? fallax Grunow | Page -- | Plate 39 | Figure 16c | |
| Synedra | famelica Kütz. | Page 152 | Plate 39 | Figure 17abc | |
| Synedra | famelica var. ? minuscula Grunow = Synedra minuscula Grunow | Page -- | Plate 39 | Figure 13 | |
| Synedra | familiaris f. major Grunow = Synedra rumpens var.? familiaris f. major Grunow | Page -- | Plate 40 | Figure 16 | |
| Synedra | familiaris f. parva Grunow = Synedra rumpens var. ?familiaris f. Parva Grunow | Page -- | Plate 40 | Figure 15 | |
| Synedra | fasciculata Kütz. = Synedra affinis var. fasciculata (Kütz.) Grunow | Page 153 | Plate 41 | Figure 15[ab] | |
| Synedra | flexuosa Bréb. = Eunotia flexuosa (Bréb.) Kütz. | Page -- | Plate 35 | Figure 9,10 | |
| Synedra | formosa var. amphipachya Grunow | Page -- | Plate 42 | Figure 8 | |
| Synedra | frustulum Kütz. = Nitzschia frustulum (Kütz.) Grunow | Page -- | Plate 68 | Figure 28,29 | |
| Synedra | fulgens (Kütz.) W.Sm. | Page 154 | Plate 43 | Figure 1,2,4 | Note 235 |
| Synedra | fulgens var. dalmatica (Kütz.) Grunow | Page -- | Plate 43 | Figure 5 | |
| Synedra | fulgens var. mediterranea Grunow | Page -- | Plate 43 | Figure 3 | |
| Synedra | gaillonii (Bory) Ehrenb. | Page 152 | Plate 39 | Figure 18 | Note 236 |
| Synedra | gaillonii var. macilenta Grunow | Page -- | Plate 40 | Figure 1 | |
| Synedra | gaillonii var. macilenta Grunow | Page -- | Plate 42 | Figure 5 | |
| Synedra | gaillonii var. minor Kütz. | Page -- | Plate 40 | Figure 2 | |
| Synedra | gibbosa Ralfs. = Ceratoneis arcus (Ehrenb.) Kütz. | Page -- | Plate 37 | Figure 7 | |
| Synedra | gloiophila Grunow = Synedra vaucheriae var. ? gloiophila Grunow | Page -- | Plate 40 | Figure 21 | |
| Synedra | gracilis Grunow = Synedra commutata var. septentrionalis Grunow | Page -- | Plate 40 | Figure 5 | |
| Synedra | gracilis Kütz. | Page -- | Plate 43 | Figure A,B | |
| Synedra | gracilis Kütz., partim = Synedra affinis var. gracilis Grunow | Page -- | Plate 41 | Figure 15c | |
| Synedra | gracilis Kütz., partim = Synedra affinis var. intermedia Grunow | Page -- | Plate 41 | Figure 21 | |
| Synedra | gracilis W.Sm. = Synedra pulchella var. saxonica (Kütz.) Grunow | Page -- | Plate 41 | Figure 3 | |
| Synedra | hemicyclus Ehrenb.?= Pseudoeunotia hemicyclus (Ehrenb.) Grunow | Page -- | Plate 35 | Figure 23 | |
| Synedra | hennedyana W.Greg. | Page 154 | Plate 42 | Figure 3 | |
| Synedra | hennedyana f. longissima ? Grunow = Synedra hennedyana W.Greg. | Page -- | Plate 42 | Figure 3 | |
| Synedra | intermedia Grunow = Synedra affinis var. intermedia Grunow | Page -- | Plate 41 | Figure 21 | |
| Synedra | investiens W.Sm. | Page 152 | Plate 40 | Figure 3[a] | |
| Synedra | investiens var. capensis Grunow | Page -- | Plate 40 | Figure 3d | |
| Synedra | investiens var. fragilarioides Grunow | Page -- | Plate 40 | Figure 3b | |
| Synedra | investiens var. genuina Grunow | Page -- | Plate 40 | Figure 3c | |
| Synedra | investiens var. gomphonemacea Grunow | Page -- | Plate 40 | Figure 3e | |
| Synedra | laevigata var. angustata Grunow | Page -- | Plate 40 | Figure 7 | |
| Synedra | laevis Kütz., partim = Synedra affinis var. hybrida f. elongata Van Heurck | Page -- | Plate 41 | Figure 9b | |
| Synedra | laevis Kütz., partim = Synedra affinis var. acuminata Grunow | Page -- | Plate 41 | Figure 14 | |
| Synedra | laevis Kütz., partim = Synedra pulchella var. smithii Ralfs | Page -- | Plate 41 | Figure 2 | |
| Synedra | lanceolata f. brevis ? Van Heurck = Synedra ulna var. lanceolata f. brevis Van Heurck | Page -- | Plate 38 | Figure 9 | |
| Synedra | lanceolata ? f. longior Van Heurck = Synedra ulna var.lanceolata (Kütz.) Grunow | Page -- | Plate 38 | Figure 10 | |
| Synedra | longissima W.Sm. = Synedra ulna var. longissima (W.Sm.) Grunow | Page 151 | Plate 38 | Figure 3 | |
| Synedra | lunaris Ehrenb. = Eunotia lunaris (Ehrenb.) Bréb. | Page 144 | Plate 35 | Figure 3,4,6a | |
| Synedra | minuscula Grunow | Page -- | Plate 39 | Figure 13 | |
| Synedra | minutissima W.Sm. = Synedra pulchella var. lanceolata O'Meara | Page -- | Plate 41 | Figure 7 | |
| Synedra | multafasciata Kütz., partim = Nitzschia linearis (C.Agardh) W.Sm. | Page -- | Plate 67 | Figure 13,14,15 | |
| Synedra | nitzschioides Grunow | Page 153 | Plate 43 | Figure 7,8,9,10 | |
| Synedra | nitzschioides f. cuneata Grunow = Sceptroneis nitzschioides Grunow | Page -- | Plate 37 | Figure 4 | |
| Synedra | notata Kütz., partim ? = Synedra ulna var. ? notata (Kütz.) Grunow | Page -- | Plate 39 | Figure 1b | |
| Synedra | obtusa W.Sm. = Synedra ulna var. obtusa (W.Sm.) Van Heurck | Page -- | Plate 38 | Figure 6 | |
| Synedra | oxyrhynchus Kütz. = Synedra ulna var. oxyrhynchus (Kütz.) Van Heurck | Page 151 | Plate 39 | Figure 1a | |
| Synedra | oxyrhynchus var. undulata Grunow | Page -- | Plate 39 | Figure 2 | |
| Synedra | oxyrhynchus W.Sm. nec Kütz. = Synedra acus Kütz. | Page 151 | Plate 39 | Figure 4[a] | |
| Synedra | palea var. minor Kütz. = Nitzschia palea var. minuta (Bleisch) Grunow | Page -- | Plate 69 | Figure 23 | |
| Synedra ? | parasitica (W.Sm.) Grunow = Fragilaria parasitica (W.Sm.) Grunow | Page -- | Plate 45 | Figure 30 | |
| Synedra | parva [?] = Synedra barbatula Kütz. | Page -- | Plate 40 | Figure 6bcd | Note 237 |
| Synedra | parva Kütz. = Synedra affinis var. parva (Kütz.) Grunow | Page 153 | Plate 41 | Figure 23 | |
| Synedra | parva var. [Van Heurck] | Page -- | Plate 41 | Figure 22 | |
| Synedra | parva var. chilensis Grunow | Page -- | Plate 41 | Figure 24 | |
| Synedra | parvula Kütz. = Synedra vaucherii var. parvula (Kütz.) Rabenh. | Page 150 | Plate 40 | Figure 22 | Note 238 |
| Synedra | parvula Kütz., partim = Nitzschia communis var. obtusa Grunow | Page -- | Plate 69 | Figure 33,34 | |
| Synedra | perminuta Grunow = Synedra vaucheriae var. ? perminuta Grunow | Page -- | Plate 40 | Figure 23 | |
| Synedra | provincialis Grunow | Page -- | Plate 40 | Figure 8 | |
| Synedra | provincialis var. tortuosa Grunow | Page -- | Plate 40 | Figure 9 | |
| Synedra | pulchella (Ralfs) Kütz. | Page 149 | Plate 40 | Figure 28,29 | Note 239 |
| Synedra | pulchella f. major Grunow | Page -- | Plate 40 | Figure 27 | |
| Synedra | pulchella f. major Grunow | Page 150 | Plate 41 | Figure 1 | |
| Synedra | pulchella var. genuina [Grunow] = Synedra pulchella (Ralfs) Kütz. | Page -- | Plate 40 | Figure 28,29 | |
| Synedra | pulchella var. genuina f. major [Grunow] = Synedra pulchella f. major Grunow | Page -- | Plate 41 | Figure 1 | |
| Synedra | pulchella var. lanceolata O'Meara | Page 150 | Plate 41 | Figure 7 | |
| Synedra | pulchella var. macrocephala Grunow | Page -- | Plate 41 | Figure 6 | |
| Synedra | pulchella var. naviculacea Grunow | Page -- | Plate 41 | Figure 8 | |
| Synedra | pulchella var. saxonica (Kütz.) Grunow | Page -- | Plate 41 | Figure 3 | |
| Synedra | pulchella var. smithii Ralfs | Page 150 | Plate 41 | Figure 2 | |
| Synedra | pulchella var. smithii f. [Grunow] | Page -- | Plate 41 | Figure 4 | |
| Synedra | pulchella var. tenuistriata Grunow | Page -- | Plate 41 | Figure 5 | |
| Synedra | pusilla Kütz. = Navicula saugerri var. striis tenuioribus ? Grunow | Page -- | Plate 14 | Figure 16b | |
| Synedra | radians H.L.Sm. = Synedra ulna var. vitrea ith, nec Kütz., nec W. Sm. 38 (11, 12a) | Page -- | Plate 38 | Figure 11,12a | |
| Synedra | radians Kütz. | Page 151 | Plate 39 | Figure 11 | Note 240 |
| Synedra | robusta Ralfs | Page -- | Plate 42 | Figure 6,7 | |
| Synedra | rumpens Kütz. | Page -- | Plate 40 | Figure 14 | Note 241 |
| Synedra | rumpens [var.] genuina Grunow = Synedra rumpens Kütz. | Page -- | Plate 40 | Figure 14 | |
| Synedra | rumpens var. ? familiaris f. parva Grunow | Page -- | Plate 40 | Figure 15 | |
| Synedra | rumpens var. ? familiaris Kütz., forma major | Page -- | Plate 40 | Figure 16 | |
| Synedra | rumpens var. ? fragilarioides Grunow | Page -- | Plate 40 | Figure 12 | |
| Synedra | rumpens var. ? meneghiniana Grunow | Page -- | Plate 40 | Figure 13 | |
| Synedra | rumpens var. ? scotica Grunow | Page -- | Plate 40 | Figure 11 | |
| Synedra | saxonica Kütz. = Synedra pulchella var. saxonica (Kütz.) Grunow | Page -- | Plate 41 | Figure 3 | |
| Synedra | scalaris Ehrenb. = Nitzschia scalaris (Ehrenb.) W.Sm. | Page -- | Plate 60 | Figure 14,15 | |
| Synedra | sigma Kütz. = Nitzschia sigma (Kütz.) W.Sm. | Page -- | Plate 65 | Figure 7,8 | |
| Synedra | sigmoidea (Nitzsch) Kütz. = Nitzschia sigmoidea (Nitzsch) W.Sm. | Page -- | Plate 63 | Figure 5,6,7 | |
| Synedra | spathulifera Grunow = Synedra ulna var. spathulifera Grunow | Page -- | Plate 38 | Figure 4 | |
| Synedra | spectabilis Ehrenb. = Nitzschia spectabilis (Ehrenb.) Ralfs | Page 180 | Plate 67 | Figure 8,9 | |
| Synedra | splendens Kütz. = Synedra ulna var. splendens (Kütz.) Van Heurck | Page 150 | Plate 38 | Figure 2 | |
| Synedra | subaequalis Grunow = Synedra ulna var. subaequalis Grunow | Page -- | Plate 38 | Figure 13 | |
| Synedra | subarcuata Nägeli = Eunotia lunaris var. subarcuata (Nägeli) Grunow | Page -- | Plate 35 | Figure 2 | |
| Synedra | subtilis Kütz., partim = Nitzschia subtilis (Kütz.) Grunow | Page -- | Plate 68 | Figure 7,8 | |
| Synedra | subtilis Kütz., partim = Synedra affinis var. subtilis Grunow | Page -- | Plate 41 | Figure 18 | |
| Synedra | tabulata Kütz. = Synedra affinis var. tabulata Kütz. | Page 153 | Plate 41 | Figure 9a | |
| Synedra | tenella Grunow | Page -- | Plate 41 | Figure [26] | Note 242 |
| Synedra | tenera W.Sm. | Page -- | Plate 39 | Figure 12 | |
| Synedra | tenuis Kütz., partim = Synedra affinis var. tenuis Grunow | Page -- | Plate 41 | Figure 17 | |
| Synedra | tenuis Kütz., partim = Synedra tenera W.Sm. | Page -- | Plate 39 | Figure 12 | |
| Synedra | tenuissima Kütz., partim = Synedra acus var. [Grunow] | Page -- | Plate 39 | Figure 4bcd | |
| Synedra | truncata Grev. partim ? = Synedra vaucheriae var.? truncata (Grev., partim) Rabenh. | Page -- | Plate 40 | Figure 20 | |
| Synedra | ulna (Nitzsch) Ehrenb. | Page 150 | Plate 38 | Figure 7 | |
| Synedra | ulna var. amphirhynchus (Ehrenb.) Grunow | Page 151 | Plate 38 | Figure 5 | |
| Synedra | ulna var. bicurvata (Biene) Grunow | Page -- | Plate 38 | Figure 8 | |
| Synedra | ulna var. danica (Kütz.) Grunow | Page 151 | Plate 38 | Figure 14a | |
| Synedra | ulna var. danica f. area media laevi destituta Van Heurck | Page -- | Plate 38 | Figure 14b | |
| Synedra | ulna var. lanceolata (Kütz.) Grunow | Page 151 | Plate 38 | Figure 10 | |
| Synedra | ulna var. lanceolata f. brevis Van Heurck | Page -- | Plate 38 | Figure 9 | |
| Synedra | ulna var. lanceolata f. longior Van Heurck = Synedra ulna var. lanceolata (Kütz.) Grunow | Page -- | Plate 38 | Figure 10 | |
| Synedra | ulna var. longissima (W.Sm.) Grunow | Page 151 | Plate 38 | Figure 3 | |
| Synedra | ulna var. longissima f. area media laevi destituta = Synedra ulna var. longissima (W.Sm.) Grunow | Page -- | Plate 38 | Figure 3 | |
| Synedra | ulna var. ? notata (Kütz.) Grunow | Page -- | Plate 39 | Figure 1b | |
| Synedra | ulna var. obtusa (W.Sm.) Van Heurck | Page 151 | Plate 38 | Figure 6 | |
| Synedra | ulna var. oxyrhynchus (Kütz.) Van Heurck | Page 151 | Plate 39 | Figure 1a | |
| Synedra | ulna var. spathulifera Grunow | Page 151 | Plate 38 | Figure 4 | |
| Synedra | ulna var. splendens (Kütz.) Van Heurck | Page 150 | Plate 38 | Figure 2 | |
| Synedra | ulna var. subaequalis Grunow | Page 151 | Plate 38 | Figure 13 | |
| Synedra | ulna var. vitrea (Bory) Van Heurck | Page 151 | Plate 38 | Figure 11,12ab | |
| Synedra | ulna var. vitrea f. longirostris Grunow = Synedra ulna var. vitrea (Bory) Van Heurck | Page -- | Plate 38 | Figure 11 | |
| Synedra | undulata (Bail.) W.Greg. | Page 154 | Plate 42 | Figure 2 | Note 243 |
| Synedra | vaucheriae (Kütz.) Kütz. | Page 150 | Plate 40 | Figure 19 | |
| Synedra | vaucheriae var. ? capitellata Grunow = Synedra capitellata Grunow | Page -- | Plate 40 | Figure 26[a] | |
| Synedra | vaucheriae var. deformis Grunow | Page -- | Plate 40 | Figure 18 | |
| Synedra | vaucheriae var. distans Grunow | Page -- | Plate 40 | Figure 17 | |
| Synedra | vaucheriae [var.] genuina Van Heurck = Synedra vaucheriae (Kütz.) Kütz. | Page -- | Plate 40 | Figure 19 | |
| Synedra | vaucheriae var. ? gloiophila Grunow | Page -- | Plate 40 | Figure 21 | |
| Synedra | vaucheriae var. parvula (Kütz.) Rabenh. | Page 150 | Plate 40 | Figure 22 | Note 244 |
| Synedra | vaucheriae var. perminuta Grunow | Page 150 | Plate 40 | Figure 23 | |
| Synedra | vaucheriae var. ? truncata (Grev., partim ?) Rabenh. | Page -- | Plate 40 | Figure 20 | |
| Synedra | vermicularis (Kütz.) = Nitzschia vermicularis (Kütz.) Hantzsch | Page -- | Plate 64 | Figure 2 | |
| Synedra | vitrea (Bory) Kütz. = Synedra ulna var. vitrea (Bory) Van Heurck | Page 151 | Plate 38 | Figure 11,12a | Note 245 |
| Synedra | vitrea f. angustior, tenuirostris Grunow = Synedra ulna var. vitrea (Bory) Van Heurck | Page -- | Plate 38 | Figure 12b |