— 128 — 



Raphoneis Ebb. 



74. R. amphiceros Ehb. Cl. Vega Exp. tab. XXVII, fig. 52 a. V. H. 

 Syn. tab. XXXVI, fig. 20 (var. rhombica). 



KKm, KKt (6 samples). 



Area: on the coasts of Europe, Rio Grande, „in Virginia et Marylandia" 

 (Ehb. sec. de Toni), Borneo. 



— — var. cruciata CI. Jan. & Rabh. Hond. tab. I, fig. 5. V. H. 

 Syn. tab. GXVI, fig. 16. 

 KKt, LN (11 samples). 

 Area: Honduras, Seychelles, Java, Samoa. 



75. R. bilineata Gl. & Grun. GI. Vega Exp. tab. XXXVII, fig. 55 b. 

 KKt (9 samples). 



Area: Borneo, Ceylon, Java. 



The specimens examined by me are often rather small and com- 

 paratively broad (L. 0,015 mm., b. 0,008 mm.) and the apices less pro- 

 tracted. It thus gets a certain resemblance to Gephyria sp. in Castracane 

 (Ghall. Exp. tab. XXV, fig. 19) and to Gephyria Castracanei Leud. Fortm. 

 (la Mai. tab. II, fig. 8). 



In a sample labelled „Off Koh Kam" I found a Baphoneis, of which 

 I have (tab. I, fig. 6) given a figure. Probably it is R. bilineata Gl. & 

 Grun. var. contracta Grun. (cnfr. GI. Vega Exp. p. 499). 



76. R. marginulata GI. & Grun. GI. Vega Exp. tab. XXXVII, fig. 57. 

 KKt, LN (2 samples). 



Area: Seychelles, Borneo. 



Dimerogramma Ralfs. 



77. Dimerograinma fulvnm Greg. Perag. Diat de Fr. tab. LXXX, 

 figs. 17-18. 



KKt (1 sample). 



Area: on the coasts of Europe, Mediterranean, Adriatic. 



Glyphodesmis Grev. 



78. G. siamensis Östr. n. sp. Tab. nostr. I, fig. 9. 



L. 0,059 mm., b. 0,013 mm. Costæ 6,5 in 0,01 mm. alternating 

 with double rows of puncta. Valve lanceolate, the pseudoraphe 

 in the middle extended to a lancetlike area, on the apices a blank 

 oval elevated spot. 



Solitary in a sample from LN. 



1 suppose this form to be a Glyphodesmis in spite of its double row 

 of puncta; perhaps it is allied to Glyph, eximia Grev. (Mier. Jour. II, 

 tab. IV, fig. 9). 



