Bacillariese, Gomphonemacese, Gomphonema. 429 



Hab. in aquis dulcibus in Gallia (Brebisson) Germania (Kuet- 

 zing) et Italia (Piccone, Ardissone). — An Gomphonematis par- 

 vuli Kuetz. varietas? 



21. Gomphonema angustatum Kuetz. Bacill. p. 83, t. 8, f. 4 (sub H44 

 Sphenella), V. H. Syn. p. 126, t. 24, f. 48-50, Gomphonema imtri- 

 catum var. angusiatum (Kuetz.) Brun Diat. Alp. pag. 41, Gom- 

 phonema commune Rabenh. Fl. Eur. Algar. I, p. 283, Sphenella 

 naviculoides Hantzsch in Rabenh. Alg. Eur. n. 1322 non Gompho- 

 nema navicuioides W. Sm. — Valvis latiuscule lanceolatis, sub- 

 regularibus, circiter 4-5-ies longioribus quam latioribus, h. e. 24 « 5, 

 apicibus obtusis leniter-rostrato-subcapitatis; rhaphe area hyalina, 

 distincta, medio substauriformi cincta; striis transversis leniter ra- 

 diantibus, 10-13 in 10 u.. 



Hab. in aquis dulcibus in rivulis fossisque Germaniae, Moraviae, 

 Austrise, Rumeliae, Helvetiae, Belgii etc — Individua post divisionem 

 spontaneam ssepius 2-4-6 conjuncta permanent, observante quoque 

 Rabenhorst. — Affinia sunt Gomphonema Sarcophagus Greg., G. 

 insigne Greg., G. vulgare Kuetz. 



22 Gomphonema Sarcophagus Greg. in Micr. Journ. 1856, p. 13, t. 1, 1745 

 f. 42, Rabenh. Fl. Eur. Algar. I, p. 284, Brun Diat. Alp. p. 35, 

 t. 6, f. 10, V. H. Syn. t. 25, f. 2, Gomphonema cequaie Greg. 1. 

 c f. 41?, Rabenh. Alg. sub n. 1083, V. H. Syn. t. 25, f. 3. — 

 Parvum; valvis angustis, 12-35 a. longis, lineari-oblongis, ad polos 

 rotundatos capitatos abrupte constrictis, nodulo centrali rotundato; 

 striis transversis 8-12 in 10 u., rhaphen non attingentibus ; fru- 

 stulis e facie connectivali visis elongatis, subconicis ; stipitibus sim- 

 plicibus brevibusque. 



Hab. in rivulis, fossis Scotiae (Gregory), Helvetise (Brun, 

 Wartmann), prope « Briinn » Moraviae (Nave), ad «Kirchdorf/> 

 AustriEe superioris (Schiedermayr), Hungariae (Kalchbrenner), 

 Serbise (Istvanffi). 



23. Gomphonema parvulum Kuetz. Bacill. pag. 83, t. 30, f. 63 (sub 1746 

 Spheneiia), Rabenh. Fl. Eur. Algar. I, p. 291, Grun. Diat. Kasp. 

 p. 107, V. H. Syn. p. 125, t. 25, f. 9, Spheneiia panmla Kuetz. 

 Sp. p. 62, Gomphonema minutissimum Br6b. mscr. nec Ehrenb. et 

 Ralfs quod Rhoicospheniam sistit, Gomphonella parvula Rabenh. 

 Siiss. Diat. p. 61, Spheneiia rostellota Kuetz. Bacill. p. 83, t. 9, f. 3, 

 Sp. p.62, Gomphonema rostellatum Rabenh. Fl. Eur. Algar I, p. 283, 

 Gomphonema Lagenuia Kuetz. Bacill. p. 85, t. 30, f. 60, Rabenh. 

 Siissw. Diat. p. 59, tab. 8, f. 24, Fl. Eur. Algar. I, p. 290 teste 



