CURVELLA. 351 



last rounded beneath. Aperture verticnl, truncately ovate ; peri- 

 stome simple, thin ; right margin considerably curved forwards ; 

 cokimellar vertical, curving to tlie left near the base, frequently 

 straight, rather broadly reliexed. 



"Length 7, diam. 3| mill., length of apert. 'A^ mill." 

 (Blanford.) 



J/ah. Burma: Pegu, west of the Irawaddy (Blanford). 



" The nearest ally of this species is its congener B. putns, Bens., 

 which inhabits the same localities, and differs in its gre^iter 

 tumidity and less marked sculpture. ■ There is, however, nuich 

 variation in the first named character, and despite the great 

 difference between the two forms in general, there is some 

 appearance of a passage. Two specimens of B. putus which I 

 possess, measuring respectively 7 and S| millem. in length, are 

 both 5 millem. in diameter. Both these shew a tendency to a 

 passage to Spiraxis." {Blanford.) 



I have seen two specimens in the British Museum which 

 measure 6 mm. in length with a diameter of 3'5 mm., but they 

 are probably immature. 



312. Curvella pusilla, Blanford. 



Spiralis pusilla, Blanford, J. A. S. B. xxxiv, LSGo, p. 78; I'feiffer, 



3lon. Ilelic. Viv. vi, 1868, p. 192 ; Hauley .\: Theobald, Conch. 



Ind. 1874, pi. 79, fig. 8. 

 Hapalus piisillus, Xevill, Hand List, i, 1878, p. 174. 

 iite.nogyra {Spiraxis {l^uspira.vis)) pusilla, Pf'eifter & Clessiu, 



Xomencl. Helic. Viv. 1881, p. 324. 

 Curvella pusilla, PJlsbrv, Man. Conch, ser. 2, xviii, 190G. p. (34, 



pi. 9, fig. 48. 



Orif/inal description : — " Shell imperforate, ovate, thin, horny, 

 yellowish white, costulately striated. Spire oonically pyramidal ; 

 sides straight ; apex rather acute ; suture impressed. Whorls 5, 

 convex ; the last longer than the spire (ratio = 4: 3) and rounded 

 beneath. Apei-ture rather oblique, subpyriform ; peristome simple, 

 acute, much curved forwards on the right margin ; columella 

 scarcely twisted, reilexed, appressed on the whorl. 



" Length 6, diam. 3g, length of aperture 3| mill."' (Blanford.) 



Hab. Burma: Prome, Pegu (5/«H/b/-tZ). 



"I am not quite sure if all of tlie few specimens I possess of 

 this peculiar small form came from Akoutoung, or whether some 

 may not be from Thayet Myo. The shell resembles voung 

 specimens of Buliuius imtus, Bens., so closely, that it can onlv be 

 distinguished by the absence of any perforation." (Blanford.) 



313. Curvella puta, Benson. 



Bulimus putus, Benson, A. M. N. H. ser. 2, xix, 1857, p. 030; 

 Pfeifler, Mon. Plelic. Viv. iv, 1859, p. 502 ; Blanford, J. A. S. B. 

 xxxiv, 1865, p. 94; Hanley & Theobald, Conch. Ind. 1874, pi. 80, 

 tiff. 9. 



