— 158 — 



Hantzschia Grun. 



254. H. marina (Donk.) Grun. var. leptocephala Öst. n. var. Tab. 

 nostr. II, fig. 31. 



L. 0,04 mm., b. 0,0045 mm. Garinal puncta 5,5 in 0,01 mm. 

 Striæ 11 in 0,01 mm. 



Solitary in a sample from LN (only one specimen met with). 

 Area of the main species: Davis Strait, Europe. 



Homoeocladia Ag. 



255. H. sigmoidea W. Sm. Syn. tab. LV, fig. 349. 

 LN. 



Area: Europe, Morocco. 



Surirelloideae. 

 Surirella Turp. 



256. S. Comis A. S. A. S. Atl. tab. IV, fig. 3. 



Found only in a sample from KMn— GLt. 



Area: Gampeachy Bay, Puerto Gabello, Java, Samoa. 



257. S. eximia Grev. A. S. Atl. tab. IV, fig. 13. 



KKt, LN (4 samples). 



Area: the coasts of France, Java. 



258. S. fastuosa Ehr. A. S. Atl. tab. V, figs. 7 & 10. 

 KKt, KGn, KMn— GLt, TK (11 samples). 



— — var. cuneata Witt. Perag. Ï. c. tab. LVIII, fig. 3. 

 Found only in a sample without habitat. 



var. robusta A. S. A. S. 1. c. tab. GGVI, fig. 3. 



Found only in a sample without habitat. 



— — var. Perag. Diat. de Fr. tab. LIX, fig. 2 (from Banyuls). 

 Found only in a sample from KMn— GLt. 



Area of the main species: Gulf of Mexico, Gampeachy Bay, Europe, Yoko- 

 hama, Java, Madagascar, Tahiti, Hawaii, 

 var. cuneata: Trégurie (Peragallo). 

 var. robusta : Sumbava (A. S. Atl.). 



259. S. Gemma Ehr. V. H. Syn. tab. LXXIV, figs. 1-3. 



KMn— GLt, TK, s.l. (3 samples). 

 Area: Rio Grande, Europe, Java. 



260. S. Kittoniana Leud. Fortm. A. S. Atl. tab. GGV, fig. 17. 



Found only in a sample from KKt. 

 Area: Samoa. 



