GLESSULA, NON-PENINSULAR INDIA TO INDO-CHINA. 97 



columella deeply arcuate, calloused, the base obliquely trun- 

 cate; peristome unexpanded, rather thick, obtuse. Length 

 11, diam. 5, aperture 4x3 mm. (Bens.). 



Sinchul and Darjiling (type loc.) at 8500 and 7000 ft. 

 (W. S. Blanford) ; Naga Hills (Beddome). 



Achatina orobia BENS., Ann. and Mag. N. H. (3) v, June, 

 1860, p. 461. PPR., Monogr. vi, 224. H. & T., Conch. Ind. 

 pi. 18, f. 7. 



"Distinguished from the larger Khasia species, A. crassi- 

 labris, by its peculiar sculpture, and by the formation of the 

 whorls below the suture " (Bens.). 



72. G. GEMMA (' Benson ' Reeve). PL 13, figs. 1, 3. 



Shell oblong-conical, rather solid, whorls 6, rounded, 

 smooth, columella arched, abbreviated, aperture nearly round ; 

 purple-black, shining (Reeve). 



Shell ovate-oblong, rather solid, smooth, glossy, pellucid, 

 purplish-corneous. Spire high-conic, the apex rather acute; 

 suture rather deep. Whorls 6, a little convex, the last two- 

 fifths the total length, rounded at the base. Columella arcu- 

 ate, somewhat calloused, abruptly truncate nearly at the base 

 of the subrhombic-oval aperture; peristome simple, unex- 

 panded, the right and basal margins slightly arcuate. Length 

 8 to 8.5, diam. 4, aperture 3x2 mm. (Pfr.). 



Lower Bengal, Barrakpore (Benson, type loc.) ; Rajma- 

 hal; Chittagong; plains of Malabar and Beypur (Beddome). 

 Jessore District, Chardbally and Moisraka (Nevill) ; Chander- 

 nagore (Main waring) ; Arakan; Garo Hills (Austen). 



Achatina gemma Bens. MS., REEVE, Conch. Icon, v, pi. 

 22, f. 123 (March, 1850). PFR., Monogr. iii, p. 496; Conchyl. 

 Cab. p. 314, pi. 25, f. 24, 25. H. & T., Conch. Ind. pi. 36, 

 f. 7. BENSON, Ann. Mag. v, 1860, p. 464 (large var., 8x3.5 

 mm.) Glessula g., BEDDOME, P. Mai. Soc. vii, 169. 8. (G.) 

 gemma NEVILL, Handlist, p. 170. 



Reeve's description and figure (fig. 1) are given above; 

 also Pfeiffer's description of a larger form of the species. 



It is dark reddish-brown, and when containing the remains 

 of the soft parts might be termed purplish-brown ; very glossy, 



