BULIMULUS-BOSTRYX-L1SSOACME. 1 N.'i 



with a very few corneous dots. Spire visibly attenuated, the apex 

 acute, usually violaceous-blackish. Whorls 6, a little convex, the 

 last shorter than the spire, slightly attenuated at base ; coluinella 

 rather straight or receding. 



Aperture slightly oblique, reddish-bordered, irregularly oval ; the 

 right margin thin, unexpanded, columellar margin dilated above, 

 appressed, nearly closing the perforation. Alt. 20, diam. 9 mill. 

 (Morel.}. 



There is a unicolored white form. 



Peru, in the Vallies of Abancay and Acostambo, west of Cnzco in 

 the interior of the Sierra, on cacti of the genus Cerens (Angrand). 



BuHiiiux cercicola [typog. err.] MOREL., Ser. Conch., iii, p. 192, 

 pi. 9, f. 7 ; B. cereicola MOREL., t. c., p. 193. PFR., Monogr., vi, p. 

 138. 



This species differs from B. balsanus in the absence of an umbil- 

 icus, which is reduced to an extremely narrow chink partly by the 

 reflexion of the columellar lip. Moreover, it is larger, with a wider 

 and at the same time less regular aperture, the coluinella being in 

 some specimens nearly vertical, and the outer lip very markedly 

 curved toward its insertion. The interior of the aperture is not en- 

 tirely fallow colored, as in the foregoing species, but only colored at 

 the edges, comprising all the visible part of the columella ; finally 

 the lines which ornament the exterior are fine and quite regularly 

 spaced. 



B. MUNSTERI Orbigny. PI. 51, figs. 9, 10, 11. 



Shell narrowly umbilicated, ovate-conic, rather thin, striatulate, 

 subpellucid; corneous-whitish, ornamented with reddish streaks; 

 spire conic, the apex rather acute; suture profound. Whorls 7, 

 convex, the last a little shorter than the spire. 



Aperture subvertical, oval ; columella somewhat receding ; per- 

 istome simple, unexpanded, the right margin very much arched 

 above, columellar margin dilated, wide. Alt. 22, diam. 11 ; aper- 

 ture 10 mill, long, 5 wide inside. (Pfr.~). 



Bolivia : Eastern foot-hills of the Cordillera ivest of Santa Cruz de 

 la Sierra (Orb.) ; (.'luuir/inixti/it, prov. Tangos, 1440 meters alt. (Stii- 

 bel). 



Helix camba ORB., Voy., pi. 34, f. 4-7 (legend on plate), not Bul- 

 imiis camba Orb., Voy., p. 263. Btilimiis mntisteriiORB., Voy. dans 

 1'Amer. Merid., p. 278. PFR., Monogr., ii,p. 109. Bulimus 



