344 ACHATIKID^. 



greater number of whorls, and the different colour of its epi- 

 dermis (which is uniform throughout), at once distinguish it. As 

 in G. erosa, the position of the former apertures is distinctly 

 indicated on the whorls." (Gochuin-Austen.) 



This species appears to have been overlooked by Pilsbry when 

 monographing the genus in the Manual of Concholog}'. 



303. Bacillum erosum, Blanford. 



Glessula erosa, Blauford, J. A. S. B. xl, 1871, p. 43, pi. 2, fig. 7 ; 



Nevill, Hand List, i, 1878, p. 172; Pfeifter & Clessiu, Nomencl. 



Ilelic. Viv. 188], p. 331. 

 Achatina {Electra) erosa, Hanlej &. Theobald, Conch. Ind. 1874, 



Pl- 78, fig. 5. _ 

 AcJiatma erosa, Pfeifi'er, Men. Ilelic. Viv, viii, 1877, p. 283. 

 Bacilluvi erosum, Pilsbry, Man. Conch, ser. 2, xviii, 1906, p. 4, pl. 1. 



figs. 9-11. 



Original description : — " Testa elongato-turrita, crassula, parum 

 nitens, baud diapbaua, longitudinaliter oblique striata, epidermide 

 fusco-straminea induta. JSpira turrita, lateribus convexiusculis ; 

 apice truncato. Anfractus apicales carentes ; superstates 7 sub- 

 planati ; superioi"es plerumque plus miuusve decorticata at erosi ; 

 sutura impressa. Peristoma simplex, acutum. Columella leniter 

 arcuata, ad basin oblique truncata. 



" Alt. 35, diam, 10, aperturae alt. 10, lat. 5 mm. 



" Alt. 30, diam. 10"5, aperturae alt. 10, lat. 5 mm. 



"Alt, 34, diam. 9, aperturae alt. 9, lat. 5 mm." {Blanford.) 



Hah. Sikkim : Darjeeling (Atl-insou J,- Stoliczl-a). 



"This species is easily distinguished from its local associate 

 G. tenuispira, Bens., by its thickness and opacity, and by the 

 character of the surface, which has none of the vitreous lustre 

 so characteristic of the genus. The upper whorls are generally 

 much eroded ; the lower, which retain the epidermis, are of a 

 dark straw colour with darker oblique bands at intervals, ap- 

 parently marking stages of growth. Under a lens very tine dark 

 spiral lines are also perceptible. I received several specimens of 

 this shell in 1863 from Mr. W. S. Atkinson, but it has not hitherto 

 been described. It appears to be a rare species. Dr. Stoliczka 

 only got two specimens in forest at the waterfall about 1000 feet 

 below Darjeeling." (Blanford.) 



The only specimen I have seen is one presented by Dr. Joseph 

 Hooker to the British Museum, and probably collected by him 

 during his famous travels in the Sikkim Himalayas. This shell is 

 decollated, seven whorls remaining, and it measures : length 

 38 mm., diameter 12 mm. 



304. Bacillum theobaldi, Hanleii. 



Achatina (Electra) theobaldi, Hanlej' MS., llanlev & Theobald, 

 Conch. Ind. 1870, p. 9, pl. 17, tig. 5. 



