24 BULIMULUS-SCUTALUS. 



cially above ; the apical whorls densely wrinkle-punctate. Spire 

 acutely conic, the apex rather obtuse. Whorls 6 to 6*, moderately 

 convex, the sutures impressed and finely crenulated, white-edged 

 below. 



Aperture about half the total length, hardly oblique, white and 

 dotted within ; outer lip simple, unexpanded ; columella with a 

 weakly convex entering fold, the columellar margin reflexed above. 



Alt. 4H, diam. 22; alt. of aperture 2U mill. 



Peruvian plateau (Castelnau) ; Environs of Chuquisaca, prov. 

 Chuquisaca, Bolivia, in gardens (Orb.). 



Bulimus thamnoicus var. D. marmorata D'ORB., Voy. dans 1'Amer. 

 Merid., p. 291, pi. 37, f. 9. Bulimus thamnoicus REEVE, Conch. 

 Icon., f. 94. Bulinus thamnoicus var. SOWB., Conch. Illustr., f. 71. 

 Bulimus alauda HUPE in Castelnau, Anim. nouv. ou rares Exped. 

 1'Amer. du Sud, Moll., p. 39, pi. 7, f. 3 (1857). PFR., Monogr., vi, 

 p. 122. 



The color-pattern seems to constantly separate this species from 

 thamnoicus, and it is less obese than revinctus. B. punctulifer has 

 different apical sculpture, and inhabits a region very different in 

 physical features. 



B. NUCINUS (Reeve). PI. 9, figs. 35, 36. 



Shell slightly perforated, ovate-conic, solid, most minutely granu- 

 lated ; whitish, irregularly painted with arcuate brown lines. Spire 

 convex-conic, acute. Whorls 5$, a little convex, the last a little 

 shorter than the spire, rotund at base. Columella somewhat straight- 

 ened, slightly receding. Aperture subvertical, oval-oblong ; peris- 

 tome thick, unexpanded, the right margin lightly arcuate, columel- 

 lar margin dilated above, reflexed, convex, subappressed. Alt. 37, 

 diam. 17J mill.; aperture 17 mill, long, 8 wide. (P/V.). 



Habitat unknown. 



Bulimus nucinus REEVE, Conch. Icon., pi. 85, f. 629. PFR., 

 Monogr., iii, p. 408. 



Streaked like a Plectostylus, but solid, with thick lip. Habitat 

 and affinities unknown. 



Group of B. culmineus. 



Andean species of Peru and Bolivia, with the shell smaller than 

 in the preceding group, generally with spiral sculpture very weak or 



