LITIIOTIS. 459 



Western Ghats, like Cremnobates, but apparently in more exposed 

 situations, being perhaps more purely an air-breather, and requiring 

 less moisture than its congener. Both probably feed upon the 

 confervoid vegetation co\eriug the surface of the rocks to whicli 

 they adhere." (Blanford,) 



I'our shells from lihor Ghat, presented by A. A. West to the 

 National Collection, only measure 6-25 mm. in diameter, but 

 three specimens from Khandala, near Bombay, presented by 

 Dr. A. H. Leitli, are considerably larger than the type, their 

 dimensions being 9 X (i'o X 3'5 mm. The same measurements are 

 attained by four shells from Siuhgarh Hill, Pooua, in the Theobald 

 collection. 



A very depressed form without any spire, a feature by which it 

 principally differs from L. tumida. 



458. Lithotis tumida, Blanford. 



Succinea (Lithotis) tumida, Blanford, J. A. S. B. xxxix, 1S70, 



p. 23, pi. 3, fig. 24 ; Nevill, liaud List, i, 1878, p. 214.__ 

 Succinea tumida, Pteifter, Novit. Couch, ser. 1, iv, 1871, p. 12, 



pi. 112, tigs. G-7 ; ibid., Men. llelic. Viv. vii, 1876, p. 35. 

 Lithotis tumida, Ilanley & Theobald, Conch. lud. 1874, pi. 81, 



tigs. 8, 9; I'feiffer & Clessin, Nomencl. llelic. Viv. 1881, 



p. 231. 



Oriijiiud description : — " Testa ovata, oblique elliptica, tenuis, 

 rubello-cornea, pariim nitida, oblique striata ; spira brevi ; apice 

 papillari ; sutura profunda. Anfr. 2-2| tumidi, lira infra-suturali 

 obtusa, antice in exemplis veteribus aliqiiando fere obsolescenti. 

 Apertura obliqua, magna, ovalis, postice non angulata ; peristoma 

 tenue, rectum, continuum, margine columellari tenuiter calloso, 

 appresso. 



"Long. 0|, diam. .'>, alt. '6, ap, long. o\, diam. vix 4 millim." 

 {Blanford.) 



llab. India : Siuhgarh, Poena (Blanford). 



"This is a second species of the remarkable sub-genus Lithotis, 

 much more tumid than the type Succinea {LitJiotis) rupicola, and 

 with a proportionally more developed spire ; it serves to connect 

 that form with the typical rock uihabiting Succineai of Western 

 India, such as *S'. (jiraarica, Theobald, and a new species from 

 Mahableshwar, the animal of which is very similar to that of 

 Lithotis. 



'' The specimens figured are not the largest that have been 

 found. Major Evezard possesses shells from Poorundhur 

 measuring 9 millimetres in length, in diameter, and 4 in 

 height (when laid with the a|)erture dow nwai'ds). In these the 

 scul[)ture is much less regular and weaker than in the accom- 

 panying figure which represents a young specimen. The largest 

 Singh ur [Sinhgarh] specimen in tiie same collection measures 8, 

 (3, and 3.t millimetres in its three dimensions, the aperture being 

 6 mill. I.y"4." {Blanford.) 



