CURVELLA. 351 



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

 stome simple, thin ; right margin considerably curved forwards ; 

 columellar vertical, curving to the left near the base, frequently 

 straight, rather broadly re flexed. 



" Length 7, diam. 3| mill., length of apert. 3J mill." 

 (Blanford.) 



Hal). Burma : Pegu, west of the Irawaddy (Blanford). 



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

 which inhabits the same localities, and differs in its greater 

 tumidity and less marked sculpture. There is, however, much 

 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 8| 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. 



Spimxis pusilla, Blanford, J. A. S. B. xxxiv, 1865, p. 78 ; Pfeiffer, 



Mon. Helic. Viv. vi, 1868, p. 192 ; Hauley & Theobald, Conch, 



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



Hapalus pusillus, Nevill, Hand List, i, 1878, p. 174. 

 Stenogyra (jSpiraxu (Euspiraxis)) pusilla, Pfeiffer & Clessin, 



Nomencl. Helic. Viv. 1881, p. 324. 

 Curvella pusilla, Pilsbry, Man. Conch, ser. 2, xviii, 1906, p. 64, 



pi. 9, % 48. 



Original description : " Shell imperforate, ovate, thin, horny, 

 yellowish white, costulately striated. Spire conically pyramidal ; 

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

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

 beneath. Aperture rather oblique, subpyriform ; peristome simple, 

 acute, much curved forwards on the right margin ; columella 

 scarcely twisted, re flexed, appressed on the whorl. 



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



Nab. Burma: Prome, Pegu (Blanford). 



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

 this peculiar small form came from Akoutoung, or whether some 

 may not be from Thayet Myo. The shell resembles young 

 specimens of Bulimus putus., Bens., so closely, that it can only 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. 330 : 

 Pfeiffer, Mon. Helic. Viv. iv, 1859, p. 502 ; Blanford, J. A. S. B. 

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

 tig. 9. 



