BULIMULUS-SOUTH AMERICAN. 73 



umbilicus. Coluruella rather straightened. Aperture slightly ob- 

 lique, elliptical-oblong, the peristome simple, unexpanded, columellar 

 margin dilated from the base, vaultingly reflexed. Alt. 23, diam. 

 11 mill. ; aperture 11 mill, long, 6 wide. (Pfr.). 



Bolivia (Cuming coll.). 



Bulimus plicatulus PFR., P. Z. S., 1856, p. 390; Monogr., iv, p. 

 488. 



B. CASTELNAUI (Pfeiffer). Unfigured. 



Shell subperforate, fusiform-turrited, rather thin, striatulate (some- 

 what decussated under a lens) ; shining, gray-whitish, with sparsely 

 scattered pellucid dots; spire elongate-conic, the apex acute, corne- 

 ous. Whorls 7i, a little convex, the last about two-fifths the length 

 of shell, attenuated at base. Columella rather straightened. Aper- 

 ture oblique, oblong, flesh-colored inside ; peristome simple, unex- 

 panded, the columellar margin dilated above, vaultingly reflexed. 

 Alt. 20, diam. 8J mill. ; alt. of aperture 8f, width 8 mill. (Pfr.). 



Rio Pampas, Bolivia (Castelnau, in Mus. Cuming). 



Bulimus castelnaui PFR., P. Z. S., 1856, p. 332 ; Monogr., iv, p. 

 473. 



A slender shell with scattered pellucid dots. Its generic position 

 is not known. 



Locality unknown. 



B. TRANSPARENS (Reeve). PI. 11, fig. 11. 



Shell subperforate, oblong-conic, thin, rugose-striate, pellucid, dull 

 corneous. Spire conic, somewhat obtuse. Whorls 6, a little convex, 

 the last a little shorter than the spire, somewhat attenuated at base. 

 Columella arcuate. Aperture oblique, oval ; peristome simple, the 

 right margin slightly arcuate, columellar margin shortly reflexed 

 above, subappressed. Alt. 19, diam. 8 mill. ; alt. of aperture 9, 

 width 5 mill. (P/r.). 



Habitat unknown (Cuming coll.). 



Bulimus transparens RVE., Conch. Icon., pi. 77, f. 566 (August, 

 1849). PFR., Monogr., iii, p. 436. 



Of as light and delicate a structure as any Lymnea. (Eve.). 



B. INUTILIS (Reeve). PI. 11, fig. 37. 



Shell perforate, oblong-conic, rather solid, irregularly plicatulate, 

 little shining, corneous. Spire conic, somewhat obtuse. Whorls 6, 

 a little convex, the last somewhat shorter than the spire, compressed 

 at base. Columella lightly arcuate. Aperture little oblique, oblong, 



