74 BULIMULUS-RHINUS. 



subangulate at base ; peristome simple, unexpanded, the columellar 

 margin dilated above and vaultingly reflexed. Alt. 17, diam. 8 

 mill. ; aperture 8 mill, long, 4 wide. (Pfr.). 



Habitat unknown (Cuming coll.). 



Bulimus inutilis REEVE, Conch. Icon., pi. 86, f. 639 (Feb., 1850). 

 PFR., Monogr., iii, p. 438. 



Differs from B. nubeculatus by the less convex whorls, the last one 

 longer, narrow umbilicus, etc. (P/K). The type should be com- 

 pared with the numerous similar Leptomerus species. 



B. HAPLOCHROUS (Pfeiffer). Unfigured. 



Shell perforate, ovate-fusiform, thin, rather smooth, not shining, 

 diaphanous, corneous whitish ; spire long, convex-turrited, rather 

 acute. Whorls 7, but slightly convex, the last a little shorter than 

 the spire, attenuated at the base. Columella lightly arcuate. Aper- 

 ture oblique, subelliptical, subangulated at base ; peristome simple, 

 unexpanded, the right margin regularly arcuate, columellar margin 

 dilated above, vaultingly reflexed. Alt. 30, diam. 12 mill.; aper- 

 ture 14 mill, long, 7 wide in the middle. (Pfr.'). 



Habitat unknown (Cuming coll.). 



Bulimus haplochrous PFR., P. Z. S., 1854, p. 125 ; Monogr., iv, p. 

 502. 



May be allied to B. krebsianus. 



Section RHINUS Albers, I860. 



Rhinus ALB., Die Heliceen (edit, von Martens), p. 223. Type 

 B. heterotrichus Moric. 



Bulimuli with the nepionic whorls finely and densely rugose from 

 the interruption of waved striae, or zigzag-striate ; the cuticle else- 

 where hairy or bristly in spiral lines. Form globose-ovate to 

 oblong; perforate; lip expanded or narrowly reflexed. Type B. 

 heterotrichus. 



Distribution, eastern and north-eastern South America, from 

 southern Brazil to Venezuela. 



These forms are closely allied to typical Bulimulus t but differ in 

 the bristly or velvet-like cuticle, which as usual functions as a holder 

 of soil for the purpose of protection. It is a further development of 

 the cuticular spirals seen in many Bulimuli of the typical group. 



