240 ENID.K. 



has a more convex spire than E. vibeoc, and the body-whorl is pro- 

 portionately larger. From E. nivicola, on the other hand, it may 

 be distinguished by its less globose form ; it is, in fact, inter- 

 mediate between these two species. Although the latter has been 

 regarded by some authors as merely a variety of arcuata, I con- 

 sider them quite distinct. Of the two first-named considerable 

 series have passed through my hand, and I have never hesitated 

 to which form to refer them. 



The specimen here figured is one of three in the Cuming collec- 

 tion labelled " India " ; it measures 13*25 x 5 mm. 



The name arcuata has a rather peculiar history. A tablet in 

 the British Museum, with twenty-six specimens received from 

 Hutton in 1856, bears on its back the following legend, appa- 

 rently copied from Button's letter or label : " Pfeiffer mistook 

 ornatus for arcuatus. Ornatus being preoccupied I changed it to 

 sylvaticus, but the mischief is done." This accounts for the fact 

 that Pfeiffer quotes Pupa sylvatica as a synonym. The largest of 

 this series measures 16 x 7 mm. and the smallest 12x5 < 25mm. 

 Another shell in the British Museum, from Simla, measures 17*5 x 

 8-25 mm., while four specimens from Mukraj, Salt Eange, which 

 I also refer to the present species, are rather different from all I 

 have seen, being of a chalky white, with pale corneous transverse 

 streaks ; these range in size between 18 x 7'5 mm. and 16 x 

 6-25 mm. 



211. Ena nivicola, Reeve. 



Bulimus nivicola (Benson), Reeve, Conch. Icon, v, 1849, Bulimus, 

 pi. 69, fig-. 496 ; Hanley & Theobald, Conch. Lid. 1870, pi. 22, 

 fig. 9. 



Sulimina (Ena) arcuata, var. sylvatica (= nivicola) , Pfeiffer & 

 Clessin, Nomencl. Helic. Viv. 1881, p. 291. 



Original description : " Shell cylindrically ovate, stout, ventri- 

 cose, sinistral. compressly umbilicated, whorls seven in number, 

 convex, obliquely striated, somewhat obscurely crenulated at the 

 sutures, coluinella rather broad, appressed, aperture small, lip 

 slightly expanded ; red-brown, marked here and there with 

 irregularly interrupted oblique white streaks, covered with a thin 

 yellowish epidermis." (Reeve.) 



Length ] 1, diam. 5*75 mm. (ex icon.). 



Hob. India : Liti Pass, W. Himalayas, 14,000 feet (Hutton). 



" Mr. Benson is of opinion that this species, distinguished by 

 its stout cylindrical form and reversed growth, which has been 

 upwards of twelve years in his collection, is the Pupa sylvatica of 

 Hutton, described in M'Clelland's Journal for January 1841, as 

 being found among jumper bushes at Burrenda Pass, and of 

 which the name is preoccupied in the present genus to which this 

 species strictly belongs. It is remarkable for its stout cylindrical 

 form and reversed growth." (Reeve.) 



