SPIRAXIS. 35 



Habitat unknown (Mus. Cuming). 



Bulimus clava REEVE, Conch. loon. v. Bulimus species 500 

 {July, 1849), Achatina pi. 16, f. 77. PFR., Monogr. iii, 398. 



Pfeiffer gives the following description of the types : Shell 

 imperf orate, turrite, rather smooth, marked with distant, 

 impressed longitudinal lines, glossy, subpellucid, tawny. 

 Spire regularly tapering, the apex obtuse; suture lightly im- 

 pressed margined. Whorls 9, flattened, the last about two- 

 sevenths the total length, rounded basally; icolumella some- 

 what calloused, arcuate. Aperture vertical, angulate-piri- 

 f orm ; peristome simple, unexpanded, the right margin arched 

 forward in the middle. Length 23, diam. 6.66, aperture 6.66 

 x 3.5 mm. (Pfr.). 



The species is unknown to me, but from the description 

 I would be disposed to think it a Jamaican snail of the sub- 

 genus Sigmataxis. The surface as described by Pfeiffer re- 

 minds one of the smaller S. procera Ad. 



36. S. L^VIUSCULUS (. B. Adams). PL 4, figs. 43, 44. 



' * Shell small, thin, glossy, diaphanous, ovate, elongate. 

 Whorls 6, not very convex, 'ornamented with a few distant 

 and very narrow longitudinal striae. Aperture long, narrow 

 and acute above ; lip thin, retracted below ; columella twisted. 

 Divergence 18 degrees; spire .16 inch long. Length .25, 

 width .075 inch [6.25 x 1.87 mm.]." (Ad.). 



The shell is very slender, pale corneous, subtranslucent, 

 thin, very glossy; sculptured with widely, unevenly spaced 

 arcuate grooves, which are obsolete on the base and absent 

 on the first two whorls. Two or three grooves am the last 

 whorl are slightly deeper, and preceded 'by an excessively 

 faint brownish streak. Whorls about 6, parted by a deeply 

 impressed suture, only weakly convex. Aperture narrowly 

 -ovate, the outer lip equably arched forward, eolumella cord- 

 like, concave below, ascending in a moderately strong spiral 

 curve above. Length 6.2, diam. 1.8 mm. 



Jamaica: Bogwalk (Henderson and Simpson) ; Braco, St. 

 Ann's (Swift coll.). 



Bulimus Iczviusculus C. B. AD., Synopsis Conch. Jam., Proc. 



