9 2 



of numerous radiating ribs, about 22 at each side, with an intermediate one in the interstices 

 at the sides, and a few at irregular intervals, they are crossed by weaker concentric ridges, 

 which form small beads on the ribs, and leave deep pits in the interstices. Slit-fasciole rather 

 large and deep, with conspicuous arched lamellae; slit long 2 1 / a , large nearly 1 Mill. at the 

 base, its margin is thickened, a flat, broad, slightly grooved rib runs towards the apex, interior 

 smooth, margin crenulated, with slightly raised sides. 



Long. 14 1 /,, lat. 11 1 /,, alt. 7'/, Mill. 



The only specimen is slightly worn, and I think the grey colour must depend on its 

 long abode in mud. It is allied to E. puncticulata Ads. (Proc. Zool. Soc. Lond. 185 1, p. 84) 

 which is still larger and differs in sculpture, that species has according to the description, only 

 28 ribs, with 3 small riblets in the interstices and in the figures the shell is much less pitted. 



8. Emargimila scabricostata A. Adams. 



A. Adams. Proc. Zool. Soc. Lond. 185 1, p. 85. 

 REEVE. Conch. Ie. Vol. XIX, Emarginula, fig. 54. 

 PlLSBRY. Man. of Conch. Vol. XII, p. 268, PI. 28, fig. 24. 



Stat. 282. Between Nusa Besi and the N.E. point of Timor. Reef. 1 Spec. 



The figures of Reeve and of Pilsbry, which is a copy of that in Sowerby's Thesaurus 

 Conch. don't show the radiating buff bands, nor can I detect them in the Siboga-specimen, 

 but the scabrous ribs are very characteristic. 



9. Emargimila (Emarginclla) clypcus A. Adams. PI. VII, fig. 12. 



A. Adams. Proc. Zool. Soc. Lond. 185 1, p. 83. 

 Reeve. Conch. Ie. Vól. XIX, Emarginula, fig. 21. 

 Pilsbry. Man. of Conch. Vol. XII, p. 265, PI. 28, fig. 7. 



Stat. 50. Bay of Badjo, West coast of Flores. Up to 40 M. Sand. 1 Spec. 



This species proves to belong to the subgenus Emarginella, founded by Pilsbry (1. c.) 

 for E. Cuvieri Audouin, on account of the voluminous animal, which partly envelops the shell. 

 This is also the case with E. clypcus. The animal has a dark coral-red foot, the tentacles, under 

 surface of the mantle, and the epipodial papillae are of the same colour, the muzzle as far as 

 visible is much darker, and the upper surface of the mantle, which covers the margin of the shell, 

 is dark flesh-colour, strongly pigmented with black, so as to give to the upper surface a brown 

 appearance. According to the figure given by Pilsbry (l.c. pi. 64, fig. 32) the sculpture of the 

 shell differs in being closely ribbed, whereas in E. Cuvieri the ribs seem to be more spaced. 



10. Emarginula (Emargiuella) sibogae n. sp. PI. VIII, fig. 1. 



Stat. 49'. Sapeh-strait. 69 M. Coral and shells. 1 Spec. 

 Stat. 133. Lirung, Salibabu-island. 36 M. Hard sand. 2 Spec. 



Stat. 305. Mid-Channel of Solor-strait, Kampong Menanga. 113 M. Stony. 1 Spec. 

 Stat. 315. East of Sailus Besar, Paternoster-islands. Up to 36 M. Lithothamnion-bottom. 1 Spec. 



92 



