280 128 
Raphoneis Ehb. 
74. JR. amphiceros Ehb. Cl. Vega Exp. tab. XXVII, fig. 52a. 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. eruciata CI. Jan. & Rabh. Hond. tab. I, fig. 5. V.H. 
Syn. tab. CXVI, fig. 16. 
KKt, LN (11 samples). 
Area: Honduras, Seychelles, Java, Samoa. 
75. R. bilineata Cl. & Grun. Cl. 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 
(Chall. Exp. tab. XXV, fig. 19) and to Gephyria Castracanei Leud. Fortm. 
(la Mal. tab. II, fig. 8). 
In a sample labelled ,Off Koh Kam‘ [ found a Raphoneis, of which 
I have (tab. I, fig. 6) given a figure. Probably it is R. bilineata Cl. & 
Grun. var. contracta Grun. (enfr. Cl. Vega Exp. p. 499). 
76. R. marginulata Cl]. & Grun. Cl. Vega Exp. tab. XXXVII, fig. 57. 
KKt, LN (2 samples). 
Area: Seychelles, Borneo. 
Dimerogramma Ralfs. 
77. Dimerogramma fulvum 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 Ostr. n. sp. Tab. nostr. I, fig. 9. 
L. 0,059 mm., b. 0,013 mm. Coste 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. (Micr. Jour. I], 
tab. IV, fig. 9). 
