SUCCINEA. 455 



S. crassiuscula, Benson." It certainly approaches that species in 

 several respects, but the last whorl does not increase so rapidly 

 and the spire is more produced. 



Several specimens from Bombay measure 13-5 mm. in diameter 

 thus exceeding the type which is in the Cuming collection. Three 

 shells from Calcutta in the Theobald collection also have a diameter 

 of 13 mm. On the other hand three specimens in the British 

 Museum collected in 1880 by Col. Wilmer on brickwork at Fort 

 William, Andaman Islands, which I refer to this species, do not 

 exceed 9 mm. and a still smaller form, collected by him at .Fort 

 William, Calcutta, only measure 6'5 mm. The shells collected 

 by the Stanley Gardiner Expedition, in the Maldive group 

 which are also in the British Museum belong to a rather slender 

 form, pale greenish corneous, and almost transparent. 



453. Succinea hanleyi, sp. n. 



Succinea subgranosa, Hanley & Theobald, Conch. Jnd. 1876, pi. 158, 

 fig. 9 (nonPfeiffer). 



Shell imperforate, elongate-conoid, finely and closely, somewhat 

 irregularly, plicate-striate, pale amber coloured. Spire elongate, 

 apex minutely papillate, suture moderately deep. Whorls 3|, 

 rather tumid, the last about ^ of the total length of the shell. 

 Aperture oblique, obovate, the margins slightly thickened, colu- 

 mellar margin shortly reflexed, with a slight elongate tubercle at 

 the junction with the basal margin. 



Long. 7, diam. 4, alt. 3-5 mm. ; apert. 4 mm. long, 3 mm. 

 broad. 



Fig. 141. Succinea hanleyi. 



Hab. India: Calcutta. 



Type in the British Museum. 



The British Museum contains four specimens from Calcutta 

 labelled Succinea subgranosa, but which differ from that species by 

 the more slender spire and in being of a pale amber colour. The 

 new species has also some relationship with S. bensoni, but the 

 aperture is less high in proportion to the spire. One of the 

 specimens has 3J whorls completed and measures nearly 8 mm. 

 in length. The shell figured in Conch. Ind. I also refer here. 



