HELIX-HELICELLA. 169 



behind the aperture, smoother, but malleated, sculptured with short 

 impressed and horizontal lines. The color is dirty-white, without 

 bands ; whorls 6, convex ; suture impressed ; the upper whorls 

 increasing slowly ; the last is dilated, inflated, especially behind the 

 aperture ; at its origin bluntly augulate, becoming round ; very 

 shortly deflected in front. Aperture oblique, circular, strongly 

 lunate, more or less tinted ,vith rose or brown within, peristome 

 acute, thin, slightly dilated on base and columella, or very slightly 

 reflected, having a strong reddish lip a short distance within. The 

 margins approach and are connected by a thin white callus. (Kob.^) 

 Alt. 81, greater diam. 15, lesser 13 mill. 



Near Oran. 



H.fabriesi Deb., KOBELT, Rossm. Icon. n. f. iv, p. 92, f. 703. 



H. BREVETI Debeaux. PI. 38, figs. 31, 32. 



Shell with open funnel-shaped umbilicus, depressed-trochiform ; 

 the spire pyramidal, apex minute, slightly projecting ; rather solid ; 

 somewhat chalky, scarcely shining, finely and densely striatulate ; 

 dull white, sometimes encircled by an almost obsolete translucent 

 band ; whorls 5, slightly convex, slowly increasing, separated by an 

 impressed suture, the last whorl large, rounded or obsoletely sub- 

 angulate at the periphery, slightly descending in front; aperture 

 oblique, subcircular, but little lunate, white within ; peristome 

 simple, acute, slightly expanded, having a thick white lip within ; 

 margins converging, joined by a very thin callus; columellar mar- 

 gin slightly dilated at the insertion. (Kob.~) 



Alt. 9, greater diam. 13, lesser 12 mill. 



Tlemsen, Province of Oran, Algiers. 



H. breveti Debeaux, KOBELT, Rossm. Icon. n. f. iv, p. 92, f. 702. 



H. HEYNEMANNI Kobelt. PI. 40, figs. 63, 64. 



Shell with wide but not perspective umbilicus ; the umbilicus 

 strongly contracted beyond the penultimate whorl ; depressed, solid, 

 striated, but little shining, chalk white, generally marked with a few 

 sharp dark brown bands ; the spire is quite depressedly convex, 

 apex small, smooth, black ; the six whorls are rather convex and 

 separated by a linear suture, they are closely regularly rib-striated 

 and increase regularly ; the last whorl is scarcely wider, nearly 

 cylindrical, and descends very slightly in front. Aperture round- 

 ovate, but little lunate, with thin sharp peristome, distinctly ribbed 



