344 ACHATINTDJE. 



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." (Godiv in- Austen.) 



This species appears to have been overlooked by Pilsbry when 

 monographing the genus in the Manual of Conchology. 



303. Bacillum erosnm, Blanford. 



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



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



Helic. Viv. 188], p. 331. 

 Achatina (Electro) erosa, Hanley & Theobald, Conch. Ind. 1874, 



pi. 78, fig. 5. 



Achatina erosa, Pfeitf'er, Mon. Helic. Viv. viii, 1877, p. 283. 

 Bacillum erosum, Pilsbry, Man. Conch, ser. 2, xviii, 1906, p. 4, pi. 1. 



figs. 9-11. 



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

 nitens, baud diaphana, longitudinal! ter oblique striata, epiderinide 

 f usco-straminea induta. Spira turrita, lateribus convexiusculis ; 

 apice truncato. Anfractus apicales carentes ; superstites 7 sub- 

 planati ; superiores pleruraque plus miuusve decorticata et erosi ; 

 sutura impressa. Peristoma simplex, acutum. Columeila leniter 

 arcuata, ad basin oblique truncata. 



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



" Alt. 36, diam. 10'5, aperturae alt, 10, lat, 5 mm. 



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



Nab. Sikkim : Darjeeling (Atkinson $ Stoliczka). 



"This species is easily distinguished from its local associate 

 0. 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 fine 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, Hanley. 



Achatina (Electni) theobaldi, Hanley MS., Hanley & Theobald, 

 Conch. Ind. 1870, p. 9, pi. 17, fig. o. 



