652 Bacillariese, Fragilariacese, Synedra. 



Grev. Sc. Cr. Fl. I, t. 16, f. 1-3 et V, t. 298, f. 3 a, Kuetz. Alg. 

 dec. n. 74, Ctenophora pulchella Hreb. rascr., Exilaria pulchella 

 Ralfs, vix, observarite Grunow, Sijnedra Vertebra Greg., ut habet 

 Pritchard. — Frustulis flabellatim congestis, rarius fasciculatis ; 

 valvis anguste hmceolatis, circ. 60 y.. longis (rarius ad 120 y.. lon- 

 gis), apicibus leniter rostrato-subcapitatis, pseudonodulo dilatato, 

 ssepe marginem attingente, pseudorhaphe angusta, pseudonndulis 

 termiualibus rainutissirais at distinctis, striis transversis 13-14 in 

 10 y.., distincte punctatis; frustulis e facie connectivali visis an- 

 gustis, linearibus, ad apices attenuatis. 



Hab. in aquis dulcibus, salsi^ et marinis (?) per totam Europam 

 hinc inde, imprirais in Anglia, Hibernia, Gallia, Belgio, Gerraania, 

 Italia, Sicilia, montibus Tatrensibus. — Var. Smithii (Ralfs) V. 

 H. Syn. p. 150, t. 41, f. 2, Synedra Smithii Ralfs in Pritcb. Inf. 

 p. 786, Rabenh. Fl. Eur. A)gar. 1, p. 131 vix 0" Mesira, Si/nedra 

 acicularia W. Sm. Br. Diat. I, p. 70, t. II, f. 86 : frustulis valde 

 elongatis (usque ad 200 y.. longis), angustioribus, striis 14-15 in 

 10 U: In aquis dulcibus Anglise (W. Smith) et Belgii (Van Heurck), 

 in aquis salsis Thuringiae et submarinis litoralibus.passim. — Var. 

 minutissima (W. Sm.) Grun. in Cl. et Grun. Art. Diat. p. 107, t. 6, 

 f. 120, Synedra pulchella var. lanceolata 0' Meara in V. H. 

 Syn. p. 150, t. 41, f. 7, Synedra minutissima W. Sra. Br. Diat. 

 I, p. 71, t. 11, f. 87 non Kuetz.: typo minor, ad 35-75 y.. longa, 

 latior, quasi naviculaeforrais, striis 14-17 in 10 v.., pseudonodulo 

 distincto. Cura specie passim;etiara in Helvetia et ad oras Norve- 

 giae. — Var. macrocephala Grun. in Cl. et Grun. Arct. Diat. p. 107: 

 valvis 135 p-. longis, medio 6, apices versus 3,5 a. latis, deraura 

 capitatis, capitulo 7 u.. lato rotundato, striis transversis 15 in 10 u.. 

 pseudonodulo latiori quani longiori. Ad a Rathan » (Grunow). — 

 Var. naviculacea Grun. in V. H. Syn. t. 41, f. 8. — Var. tenui- 

 striata Grun. in V. H. Syn. t. 41, f. 5. — Var. abnormis Macch. 

 in N. Giorn. Bot. It. XXI, 1889, p. 264 c. icone: uno apice rostri 

 ad instar incurva; striis 17 in 10 u.. In foute «Ponte Nuovo» pr. 

 «Sassuolo» Itali.TO borealis (Macchl\ti). — Long. ."^O-^O y.. 



2. Synedra Vaucheriae Kuetz. Bacill. n. 65, t. 14, f. IV, f. 1-3, Ra- 

 benh. Siissw. Diat. p. 55, t. 5, f. 15, FI. Eur. Alg. I, p. 132, W. 

 Sm. Br. Diat. I, p. 73, t. II, f. 99 (male !), Grun. in Wien. Ver- 

 handl. 1862, p. 393, t. VI, f. 9, Brun Diat. .\lp. p. 123, t. 5, 

 f. 4, V. H. Syn. p. 150, t. 40, f. 19, Exilaria Vaucherice Kuetz. 

 Syn. Diat. p. 32, f. 38, Dec. n. 24. — Valvis anguste linearibus, 



