276 124 
Striatella Ag. 
48. §. hyalina (Jan. & Rabenh.) Rabenh. Jan. & Rabenh. Hondur. 
tab. II, fig. 13. 
KKt (1 sample). 
Area: Honduras. 
49. §, delicatula (Ktz.) Grun. var. gibbosa Ostr. n. var. Tab. nostr. 
I, fig. 13. 
L. 0,01 mm., b. 0,00¢ mm. Striae very fine. Valve gibbous in 
the middle. 
Found only in two samples from KKt., but this very small hyaline form 
may easily be overlooked, 
Area: the main species: probably widely distributed. 
Climacosira Grun. 
50. €. mirifiea (W.Sm.) Grun. Jan. & Rab. Hond. tab. II, fig. 19. 
KKt (6 samples). 
Area: Brezil, West Indies, Red Sea, Mauritius, Madagascar, Malay Archi- 
pelago, Samoa, Tahiti, Hawaii. 
Grammatophora Ehb. 
51. G. marina (Lyngb.) Ktz. var. undulata Ehb. Perag. Diat. de Fr. 
tab. LXXXVII, fig. 24. 
KkKm, K Kt (6 samples). 
Area: the coasts of Europe and America, Madagascar, Ceylon, East Indian 
Archipelago, Tahiti. 
The present form corresponds exactly to the above figurs by Pera- 
gallo but is more closely striate (2Q0—22 str. in 0,01 mm.). 
52. G. oceanica Ehb. var. macilenta W. Sm.  Perag. Diat. de Fr. 
tab. LXXXVII, figs. 15—17. 
KKm, KKt, KMn—CLt, LN (14 samples). 
Area: the main species: Europe, Gape Horn, Borneo, Ceylon. 
var. macilenta: in aqvis marinis ad oras Europae passim (de Toni). 
Madagascar, Java, Samoa, Tahiti, Hawaii. 
Denticula Ktz. 
53. D. subtilis Grun. V.H. Syn. tab. XLIX, figs. 10—12. 
LN (1 sample). 
Area: England. 
