liiicillariose, Nitzschiaceao, Uenticula. 557 



200-7, i)unctis cariiialibus 7-1^/.^ striisque transversis 21 iri 10 

 '.'..; rnembrana counectivali valide longitrorsum striolata. 



Had. in lacu salso «Atchin Ghol» Lycaoniae (Kotschy). — 

 Occurrit singulatiui et in csespites adfixos aggregata. Nitzschico 

 Sigmati W. Sm. affinis. 



Species tantum nomine nota. 



11. Homoeoclatlia pungens Grun. in Cl. et Moell. Diat. n. 307, Cleve 



Vega [). 478 (nomen). 



Ilab. in Japonia. — Confer Nitzschiam'^ seriatam Cleve in 

 hac Svlloge p. 501. 



Spocies a genere removenda. 



12. Homoeocladia Bulnheimiana Rabenh. Alg. n. 1301, est Nitzschia 

 Frustulufn Grun. var. Bulnheimiana. 



13. Homoeocladia Vidovichii Grun. in Wien. Verhand . .862, p. 586, 

 t. 12, f. 32, videtur Nitzschicv ohtustv varietatem sistere. 



14. Homoeocladia sigmoidea W. Sm. Br. Diat. II, p. 81, t. 55, f. 349, 

 Niizschia Hoiwjeocladia Heib, Consp. p. 115, est Nitschia fasci- 

 Gulata Grunow. 



DENTICULA Kuetz. [1844] Bacill. p. 43, era. Grun. [1862] ia Wien. 

 Verhandi. XII, p. 546 (Etym. dens, deniis ob costas dentiformes), 

 Kirchn. Alg. Schles. pag. 196, V. H. Syn. pag. 159, De-Toni Os- 

 serv. Tasson. Bacill. 1890, p. 901. — Frustula (e facie connecti- 

 vali visa) quadrangula, apices capitatos costarum tantum ostenden- 

 tia, valva3 plus minus lanceolat», carinat», costis transversis (pun- 

 ctis, carinalibus proiongatis), subinde inaequilongis instructae; stria^ 

 punctataj inter costas pra^sentes. 



Obs. Frustula solitaria vel fascias brevissimas formantia. 



1. Denticula elegans Kuetz. Bac. p. 44, t. 17, f. 5, Rabenh. Siissw. , 

 Diat. p. 33, t. I, f. 5, Alg. n. 1081, Fl. Eur. Algar. I, pag. 115, " 

 Wartm. Cr. n. 126, Pritch. Inf. p. 773, t. III, f. A, Brun Diat. Alp. 

 p. 114, t. 3, f. 37, V. H. Syn. t. 19, f. 14-15, Tjp. n. 330, Den- 

 ticula ocellata W. Sm. Br. Diat. I, p. 22?. — Mediocris, linea- 

 ris vel lineari-Ianceolata, 20-35 w. long., apicibus obtusis rotun- 

 datis, costis 3^2-5 in 10 y.., frustulis e facie connectivaii oblongis, 

 utroque polo late rotundatis, margine punctato - oceliatis ; striis 

 transversis subtilibus, 16-20 in 10 y. 



Hah. in aquis fluentibus et stagnantibus nec non ad rupes hu- 



2192 



19,3 



