469 



for a short space, then rather convex, until the compressed basal margin; columellar side 

 strongly convex along the body-whorl, which is rather ventricose and covered by a very thin 

 layer of enamel; cokimella sHghtiy concave above, slightly reflected over an umbilical slit, 

 which is bordered by a very faint rini ; columella sHghtly truncate below. 



Alt. from apex to base of apert. 6, lat. neary 4^.2; apert. alt. 7, lat. above ^j,, below 1^3 Mill. 



The species seems to be allied to the preceding one. but differs in colour, being white 

 instead of vellowish; the spiral sculpture, which occupies only the extremities of body-whorl in 

 tortnosa but extends over more than '-/g ii"^ the new species; above and still more below, the 

 shell is less attenuated, the umbilicus is smaller and less sharply bordered in the latter species, 

 though some specimens seem to be less ventricose than other ones, the least ventricose ones 

 are still more inflated than f. i. A. aticniiata and other allied species. The differences between 

 the specimens in this respect, may be due to age or to the state of preservation, some of 

 them being more or less broken at the peristome; the measurements are those of the most 

 complete specimen. Nearest, even perhaps too nearly allied, is the recently described A. cJielidon 

 (Proc. Mal. Soc, Vol. X, p. 253, PI. 11, fig. 16; Oct. 1912), but that species is more slender, 

 and, according to figure, the aperture is more rounded above. 



6. Atys (Alicjila) cylindrica Helbling. 



Helbling. Abh. Prov. Ges. Böhmen, Vol. IV, p. 122, PI. 2, fig. 30, 31. 



Adams. Thes. Conchyl. Vol. II, p. 585, PI. 125. fig. 114. 



Reeve. Conch. Ie. Vol. XVII, Atys, fig. 7. 



PlLSBRY. Man. of Conch. Vol. XV, p. 265, PI. 33, fig. 60, 61. 



KOBELT. Martini-Chemn. Conch. Cab. Ed. II, Vol. I, Bullacea, p. 16, PI. 2, fig. 15, 16. 



Stat. 7. Near reef of Batjulmati (Java), Coralreef. 2 Spec. 



Stat. 37. Sailus ketjil, Paternoster-islands. 27 M. and less. Coral and coralsand. 20 Spec. 



Stat. 58. Near Seba, Savu, Up to 27 M. Sand. 2 Spec. 



Stat. 133. Lirung, Salibabu-island. Up to 36 M. 7 spec. 



Stat. 1S4. Near Kampong Kelang, South coast of Manipa-island. 36 M. Coral, sand. i Spec. 



Stat. 240. Banda. 9 — 45 M. Black sand, coral, Lithothamnion. 6 Spec. 



Stat. 313. East of Dangar Besar, Saleh-bay. Up to 36 M. Sand, coral, mud and reef 66 Spec. 



To this form I have united the more or less angular specimens; none of them reaches 

 the recorded length, scarcely surpassing 20 Mill. 



var. chvio-ata A. Adams. 



o 



Adams. Thes. Conchyl. Vol. II, p. 587, PI. 125, fig. 121. 



Reeve. Conch. Ie. Vol. XVII, Atys, fig. 8. 



PlLSBRY. Man. of Conch. Vol. XV, p. 266, PI. 2,3> fig- -■ 



Stat. 279. Rumah-Kuda-bay, Roma-island. 36 M. Mud and sand. i Spec. 



Stat. 301. Pepela-bay, East coast of Rotti-island. 22 M. Mud, coral and Lithothamnion. i Spec. 



This is the more elongated form, without tracé of an angle. Both specimens are small. 



7. A/ys (Aliciila) sp. 



Stat. 4. Djangkar fjava). 9 M. Coarse sand. i Spec. 



SntOG.I-EXPEDITIE XLIX'/- - 6l 



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