— m — 



scheidung aller Glimacosphenia-Arten ist überhaupt höchst prekär". In 

 settling the above „area" I therefore paid for the localities of all the four 

 species. The area of C. elongata Bail, is given by de Toni (1. c. p. 740) 

 thus : „ in mari rubro frequens in primis ad Laurencias et in mari atlantico 

 ad oras Americæ borealis et Brasiliæ: ad algas ex insulis Ganariensibus 

 et ex insula Guadelupa". 



Euphyllodium Shadbolt. 



61. E. spat hula turn Shadbolt. Tab. nostr. I, figs. 3 a— c. 



L. up to 0,1 mm., max. breadth up to 0,05 mm. The ribs 

 counted at the median line, above 6, in the middle 4,4, below 3 

 in 0,01 mm. Between the ribs square alveoli 6 in 0,01 mm. The 

 frustule cuneiform. 



KKt (22 samples), KGg— KLm (1 sample), s. 1. (2 samples). 



Area: Mediterranean, Adriatic, the coasts of England and America borealis, 

 Ile San Thome, Madagascar, Funafuti, Malay Archipelago, Ceylon, Nankoori, 

 Samoa, Hawaii. 



I think that E. spathulatum is identical with Podocystis australica 

 Witt (de Toni p. 602) and P. africana Leud. Fortm. (L. F. Afr. occid. 

 p. 31, tab. VI, fig. 2). According to de Toni both P. africana and P. 

 australica are small forms, their maximal length being 0,04 mm. The 

 present form is larger, and thus it agrees well with the figure by Grunow 

 in Wien. Akad. 1862, tab. X, fig. 13 which (measured on the figure) shows 

 the dimensions L. c. 0,1 mm., B. 0,05 mm. The form from Nankoori 

 (Grun. Novara Exp. tab. 1 A, fig. 9) is still somewhat larger and by Leud. 

 Fortm. (I.e. p. 31) the dimensions of E. spath, are given as L. 0,16 mm., 

 B. 0,09 mm. and of P. africana as L. 0,29 mm., B. 0,11 mm. However 

 must be added, that the figures of Leud. Fortm. shows less dimensions. 



Fragilarieae. 



Plagiogramma Grev. 



62. P. Atoinus Grev. Grev. South Pacific, tab. XIII, fig. 9. A. S. Atl. 

 tab. GGXI, fig. 20. 



KKt (2 samples). 



Area: Woodlark Islands, Ceylon, Java. 



63. P. denissatum Grev. A. S. Atl. tab. [LXXVI, figs. 28-29. 

 Found only in a sample from KKt. 



Area: Virginian Islands, St. Helena, Sharks Bay, Madagascar, Zanzibar, 

 Labuan, Ceylon, Java. 



64. P. Gregorianum Grev. A. S. Atl. tab. GGIX, fig. 35. 

 KKt; LN (5 samples). 



Area: Greenland, Europe, Honduras, Ceylon, Samoa. 



