Mvllusca from (lie Island of Beilan-Beilan. 133 



very depressed, almost planulate, dark reddish brown, glossy; 

 whorls 3, regularly increasing, angled above, sculptured 

 throughout with tine, closely set, transverse costulse, crossed 

 by Hue spiral striae, which arc especially noticeable on the 

 first whorl and a little beyond; suture deeply impressed, 

 wide, rather deep ; columella margin descending in a slight 

 curve; labrum simple, the margins converging; aperture 

 broadly and slightly oblique, siibcrescentic. 



Alt. - 5 (nearly), diam. maj. 1 nun. 



Hub. Island of Beilan-Beilan, to the north of the Obi 

 Islands, Dutch East Indies [Mr. Diepenluini). 



Beilaxia, subgeu. n. (PtycJiodon). 



Shell depressed, orbicular, widely umbilicate, bearing two 

 horizontal lamella? on the lower portion of the parietal wall ; 

 outer wall edentulate; apical whorls (as seen under a 1-iuch 

 objective) spirally striate. 



llab. Moluccas. 



Genotype. B. inopina, Preston. 



This and the preceding species considerably extend the 

 known range of the Endodontidce. 



Beilania inopina, sp. n. 



Shell (as seen under a 1-inch objective) minute, orbicular, 

 subplanulate, chocolate-coloured ; whorls nearly 4 in number, 

 the first whorl and a half spirally, punctately lirate, the 

 remainder coarsely, moderately distantly, and slightly 

 arcuately, transversely costulate, the interstices bearing very 

 fine and closely set transverse striae, crossed by still finer 

 spiral stria. 1 , thus presenting a minutely cancellate appear- 

 ance, the last whorl a little d< scending in front ; suture 

 rather deep; umbilicus very wide; aperture ovate, armed 

 below the periphery with two coarse, erect, entering lamellae 

 on the parietal wall ; labrum simple, the margins converging. 



Alt. '15, diam. inaj. 1*75 mm. 



Hub. Island of Beilan-Beilan, to the north of the Obi 

 Islands, Dutch East Indies (Mr. Diepenheim). 



DlEPENHEIMIA, gen. nov. 



Shell heliciform, corneous perforate, having a widely 

 grooved suture, which is continued on the last whorl as a 

 supraperipheral channel. 



Hub. Moluccas. 



Genotype. D. iridescent , Preston. 



