— 157 - 



Obtusœ Gr un. 



249. H. Vidovichi Grun. V. H. Syn. tab. LXVII, fig. 7. 

 Found only in two samples without habitat. 



Area: Villefranche, Adria, Java. 



Lanceolatœ Grun. 



250. N. Palea (Ktz.) W. Sm. var. minuta Bleisch. V. H. Syn. tab. LXIX, 

 fig. 23. 



LN (1 sample). 



Area: the main species: Europe, Abyssinia, Japan, Central Asia. 



Nitzschiella Rabenh. 



251. H. longissima (Bréb.) Ralfs. Gnfr. V. H. Syn. tab. LXX, fig. 2 

 & Glev. Westind. tab. Ill, fig. 21 (N. longissima var.? curvir ostris). 



KKt (4 samples). 



In the specimens examined by me 4V2 — 5 carinal puncta are present 

 in 0,01 mm., the central one of those being remote from the two nearest, 

 a fact which however looks to be intimated in the figure by V. H. quoted 

 above. The more spaced carinal puncta seem to give this form a position 

 nearer to Gl eve's var. curvirostris. In my specimens the horns are 

 turned in opposite directions, but like H. Per a g alio (Diat. de France 

 p. 293) I hardly think this character has any systematic value. 



Area: N. longissima: West Indies, Europe, Madagascar, Labuan, Java, 

 Samoa. 



var. curvirostris: St. Bartholomew, Java. 



252. N. Loreiiziana Grun. V. H. Syn. tab. LXX, fig. 12. 

 L. 0,25 mm. 



KKt, TK (2 samples). 

 Area: Adriatic. 



— — var.? incurva Grun. V. H. I.e. fig. 14. 

 Found only in a sample from KKt. 



Area: Adriatic. 



— — var. fossilis Brun. Brun & Temp. Japan tab. I, fig. 10. 

 KKt, s.l, (2 samples). 



Area: Calcaire de Yedo (Brun I.e. p. 46). 



253. N. diversecostata Brun. Gl. Diat. II. tab. V, fig. 11. 

 KKt (2 samples). 



Area: „Moris Creek sondage" (Brun I.e., p. 78). 



