ATYS. 273 



A.pulchra BRAZ., P. L. S. N. S. W. ii, p. 86, 1877. 



A pretty little species, having the whole surface of a rugose ap- 

 pearance, the transverse sculpture being quite distinct. In some 

 specimens the columella is sometimes straight and not curved. 



A. DENSA Brazier. Unfigured. 



Small, oval, thick, dirty white shell, finely plicated, strongly 

 transversely striated ; interstices with finer lines (as seen under the 

 lens) ; aperture narrow, wide below ; outer lip regularly arched, 

 posteriorly produced, anteriorly twisted and produced, partly cov- 

 ering the umbilicus. Length 2 lines, breadth 1? lines (Braz.'). 



Darnley Island, Torres Straits, 30 fathoms. 



A. densa BRAZ., P. L. S. N. S. W. ii, p. 86, 1877. 

 A. DUBIOSA Brazier. Unfigured. 



Shell small, oval, white, thin, shining, umbilicated at both ends, 

 the one at the base the largest, transversely very finely striated at 

 each end (scarcely visible under the lens), more distinct at the base, 

 intermediate space smooth, ventricose above the centre ; aperture 

 narrow, outer lip angled, posteriorly slightly thickened and pro- 

 duced, below straight ; columella with a single obsolete plait at the 

 base. Length 2 lines, breadth Ii lines (l?raz.). 



Darnley Island, Torres Straits, 30 fathoms. 



A. dubiosa BRAZ., P. L. S. N. S. W. ii, p. 86, 1877. 



A. M'ANDREWII Smith. Unfigured. 



Shell elongate-ovate, truncated above, pellucid, encircled by nu- 

 merous narrow milky bands, one in the middle wider ; transversely 

 distantly striated at top and base, the interstice smooth ; vertex ex- 

 cavated, bounded by an acute margin. Aperture narrow, produced 

 a little above the vertex, a little dilated and effuse at the base ; lip 

 thin, inserted in the middle of the vertex and sinuated there ; colu- 

 mella short, thickened, hardly twisted ; umbilical region slightly 

 perforated. Alt. 5, diam. 21 mill. (&). 



Lancerote, Canaries. 



A. m'andrewii E. A. S., Ann. Mag. N. H. (4), ix, p. 346. 



It is at once recognized by the numerous lacteous bands upon a 

 pellucid ground. 



A. CANARIENSIS Smith. Unfigured. 



Shell ovate, white, pellucid, striated with irregular growth lines, 

 and transversely deeply striated above and below, lightly so in the 



