33ACILLUM. 347 



entire length of the shell. Aperture oblique, pyriform, peristome 

 thickened, not reflexed or expanded, the margins united by a thick 

 callus on the parietal wall ; outer margin curving forward, basal 

 margin slightly arcuate, coluraella curved, only slightly truncate. 



Length 59, diain. 12 mm. ; apert. height 13, width 6 mm. 



Hob. India : Naga Hills, Assam (Beddome). 



Type iii the British Museum. 



Differs from B. casiacum in the smaller number of whorls, which 

 increase more rapidly, in the absence of costaB, and in the apical 

 portion being more acuminate. 



A single unnamed specimen in the Beddome collection I also 

 refer to this species. It is in a rather worn state, but the later 

 whorls show a portion of the periostracum in fair condition. 



307. Bacillum obtusum, Blanford. 



Achatina (Glessula) obtusa, Blanford, P. Z. S. 1869, p. 449. 

 Achatina (Bacillum} obtusa, Hanley & Theobald, Uonch. Ind. 1870, 



pi. 36, tig. 6. 



Achatina obtusa, Pfeitfer, Mon. Helic. Viv. viii, 1877, p. 290. 

 Glessula obtusa, Nevill, J. A. S. B. xlvi, 1877, p. 25; ibid., in 



Anderson, Zool. Res. Kxp. W. Yunnan, i, 1879, p. 886. 

 Stenoyyra (Subulina) obtusa, Pfeiffer & Clessin, Nomencl. Helic. 



Viv. 1881, p. 327. 

 Bacillum obtusum, Pilsbry, Mau. Conch, ser. 2, xviii, 1906, p. 1, 



pi. 1, fig. 1. 



Original description : " Testa elongato-turrita, albido-cornea, 

 cerea, solidiuscula, confertim flexuose plicato-striata, infra suturain 

 plicata. Spira elongata, ad apicem subcylindracea, apice perobtuso 

 papillari, sutura vix impressa subcorrugata. Aufr. 12-14, fere 

 planulati, ultimus ad peripheriam subangulatus. Apertura obliqua, 

 subovata ; peristoma simplex, rectum. 



"Long. 48-52, diain. 10-11; ap. long. 10-11, lat. 5-5| mill. ; 

 apex 3 mill, latus." (Blanford.) 



Nab. Burma : Bhamo (Anderson). 



''Very close to A. cassiaca Bens., but distinguished by finer 

 sculpture, narrower and less numerous whorls, and much more 

 obtuse apex." (Blanford.) 



On close examination B. obtusum looks quite distinct from 

 casiacum, owing to the spire being concave near the apex ; this 

 arises from the fact that, the first and second whorls are a trifle 

 wider than the third and fourth, and the apex consequently 

 becomes very obtuse. The later whorls increase very slowly and 

 regularly. The base is also broader proportionately than in 

 B. casiaca. 



The Theobald collection contains three specimens from the type 

 locality measuring 51 x 11 mm. 



