- 131 — 



only one at each end of the valve and both situated on the same side 

 of pseudoraphe. 



Area of A. Bengal: Bengal. 



92. A. inainmalis Gastr. Cl. Syn. II, tab. III, figs. 13—14. Tab. 

 nostr. I, fig. 14. 



LN (2 samples). 



Area: Galapagos, Madagascar, Macassar Strait, Malay Archipelago. 



I have figured a hypotheca of this species being somewhat irregular 

 in its outline because this hypotheca makes it still more probable that 

 Greville's Stauroneis obesa Trans. Bot. Soc. V, VIII, tab. III, fig. 12 is 

 identical with A. mam. Gast. (cnfr. GI. Syn. II, p. 187). 



93. A. longipes Ag. forma minor decussata Perag. Diat. de Fr. 

 tab. I, figs. 7 — 9. 



KKt, KM— GLt (7 samples). 



Area: the main species: the coasts of Europe, Ganarian Islands, Java, 

 Set. Paul Islands, f. min. decuss. : Nice (Peragallo). 



Cyclophora Gastr. 



94. C. siamensis Ostr. n. sp. Tab. nostr. I, fig. 12. 



L. 0,075 mm., b. greatest 0,007 mm., at the constriction 0,0065 mm. 

 Striæ not seen. Epitheca linear with slightly capitate apices. Hy- 

 potheca like epitheca but contracted in the middle. Terminal nodi 

 very small, situated out in apices. 



The present form reminds a good deal Cycl. n. sp in V. H.'s Traité 

 des Diat. p. 237, fig. 35, especially in the fact that the terminal nodi are 

 situated out in the apices; further it do not possess a perforation in the 

 central part like Cyc. tenuis Gast, in Perag. 's Diat. de Fr. tab. I, figs. 27 

 — 32, the species to which it is nearest in size. 



Area: C. tenuis Cast. : Banyuls, Philippines. C. sp. in V. H. Traité : Labuan. 



Cocconeis Ehb. 



95. €. apiculata A. S. A. S. Atl. tab. GXGVIII, figs. 31-32. 

 KKt. LN (2 samples). 



According to the description of the figure by A. S. quoted above 

 C. apic. A. S. is regarded by Grove as identical with C. robusta Leud.- 

 Fortm. Ceylon I, fig. I, which figure however P. T. G leve — with doubt — 

 refers to Achnanthes Lorenziana Grun. (GI. Syn. II, p. 186 — 187). 



Area: C. apiculata: Gape of Good Hope. C. robusta: Ceylon. 



96. C. dirupta Greg. var. Fulgur Brun. Brun Esp. nouv. tab. XVIII, 

 fig. 3. 



Found only in a sample from KKm. 

 Area: Mogador, Gabenda, Magelhans Strait. 



9* 



