BULIMULUS-BOSTRYX-GEOCERAS. 137 



Ancle* of Gi.fiHxirr*/ (r=Catamarca), under stones, 12,000 ft. alt. 

 (W. Lobb) ; on the Apnrimac River ,70 leagues from Cocabambilla, 

 at bases of cacti growing in rock crevices (Angrand). 



Bulimu* <-<,!n mi'llo ,-;.-< REEVE, P. Z. S., 1849, p. 100 ; Conch. Icon., 

 pi. 73, f. 528. PFR., Monogr., iii, p. 403. MORELET, Ser. Conch., 

 iii, p. 211. Caret ia columel/nris PFR., olim ; Spiraxis columellaris 

 PFR., Monogr., iv, p. 572 ; Nomencl. Hel. Viv., p. 323. Subulina 

 co/innrtttn'i'* H. & A. Ad., Gen. Rec. Moll., p. 111. Macroceramw 

 (Anoma') columellaris MART., Die Hel. (2), p. 270. 



B. CUSPIDATUS Morelet. PI. 45, fig. 7. 



Shell imperforate, cylindrical, smooth, whitish, obliquely streaked 

 with reddish. Spire elongated, forming an acute cone above. 

 Whorl* lh', tea reel y convex, the last scarcely wider than the penulti- 

 mate, with close, sometimes confluent streaks, and obtusely angular 

 below the middle. 



Aperture small, oblong, subangular ; peristome simple, unex- 

 panded ; columellar margin very narrowly dilated and appressed. 

 Columella nearly straight, narrow. Alt. 30, diam. 5 mill. (Morel.). 



Bank* of Apurlinac River at Cocabambilla and in the gorges of 

 ChachapoyaSj at the bases of cacti of the genus Cereus (Angrand). 



B. cuspidatus MOREL., Ser. Conch., iii, p. 210, pi. 11, f. 7 (April, 

 1863). PFR., Monogr., vi, p. 91. Rumina (Obeliscui) cuspidatm 

 PFR.-CLESS., Nomencl. Hel. Viv., p. 318. 



This species is one of a peculiar group, confined to Peru, and re- 

 sembling Cylindrella except in the aperture. The 7 or 8 earlier 

 whorls form an acute cone ; the rest are of nearly equal caliber, 

 forming a cylinder ; on the last there is an obtuse angle which is 

 obsolete on the latter part. The surface appears smooth and shin- 

 ing, but with a lens superficial growth-striae are readily seen. 



B. VERUCULUM Morelet. PI. 45, fig. 8. 



Shell sub imperforate, cylindrical, arctispiral, rather thin and 

 smooth, shining, corneous-white, generally banded with reddish. 

 Spire long, perceptibly tapering, brownish above. Whorls 19, 

 nearly flat, the last carinated, the base Jlat or concave. 



Aperture ovate-rounded, vertical, scarcely exceeding one-seventh 

 the total length ; peristome unexpanded, the right margin arcuate, 

 columellar margin narrowly expanded, dilated and somewhat ap- 

 pressed above. Alt. 24, diam. 41 mill. (Morel.'). 



Variety : pale corneous, streaked lengthwise with reddish. 



Balsa de Cocharcas, Peru (Angrand). 



UNIVERSITY 



