144 BUL1MULUS-BOSTRYX-PERON/EUS. 



exactly to the part of the whorl-wall there is a narrow chink left, 

 which must not be confused with a real perforation. 



B. emarintiiK is not without analogy with B. hamiltoni, but is dis- 

 tinguished by the lengthened spire with three more whorls, by the 

 form of the aperture and the absence of an umbilical perforation. 

 Moreover, the shell is less rudely and less deeply striate. (Morel.). 



B. SPICULATUS Morelet. PI. 45, fig. 29. 



Shell r-imate, subulate, slightly solid, pale brownish ashen, some- 

 times with faint oblique brown streaks, the apical whorls either 

 corneous, purplish or reddish. Surface lusterless, closely, finely and 

 rather regularly rib-striate. Spire slowly tapering with slightly con- 

 vex outlines to an obtuse apex. Whorls about 1(H, the earlier 

 smooth and convex, the rest nearly flat ; last whorl gently rounded 

 below, the rib-striae extending into umbilical rimation. 



Aperture small, contained about 4j times in altitude of shell,. 

 chestnut-brown within, oblique. Outer lip acute, slightly ex- 

 panded below ; columella rather long, its inner edge with a convex 

 fold; outer margin dilated above; parietal callus slight. Alt. 

 19-24, diam. 4-5 mill. 



Valley of Ollantaitambo, Peru, in arid places among cacti (An- 

 grand). 



Bulimus spiculattis MOREL, Journ. Conch., 1860, p. 375; Ser. 

 Conch., iii, p. 203, pi. 11, f. 3. PFR., Monogr., vi, p. 55. 



This is even more slender than most specimens of B. terebralis, 

 with smaller and colored aperture, no basal keel, and lacking spiral 

 sculpture. 



B. ACROMELAS Morelet. PL 45, fig. 31. 



Shell subimperforate, subulate-turrited, rather solid ; irregularly 

 flexuously striate, somewhat shining. White, marked with rare 

 corneous dots, bluish-black above. Spire lengthened, perceptibly 

 tapering, rather acute. Whorls 11, a little convex, the last slightly 

 exceeding one-fourth the length. 



Aperture oblique, small, attenuated at base, irregularly semioval ; 

 peristome simple, not expanded, thecolumellar margin dilated above 

 and appressed. Alt. 17, diam. 5 mill. (Morel.). 



Vallies of Ayacucho and Urubamba, Peru (Angrand). 



B. acromelas MOREL., Ser. Conch., iii, p. 202, pi. 11, f. 1. PFR., 

 Monogr., vi, p. 1 19. 



