BITHYNIA. 77 



Aperture : alt. 1'75, diaia. 1 mm. 



Hob. Myetmyo, Burma. 



Type in Indian Museum, Calcutta. 



154. Bithynia stenothyroides, Dohrn. 



Bithynia stenothyroides, Dohrn, P. Z. S. 1857, p. 123 ; H. & T., 

 C. I. pi. 38, figs. 7, 10. 



Original description : Testa ovata, tenera, alba vel fulva, 

 pellucida, nitida ; anfractus 4-5 convexiusculi, ultiraus efflatus, 

 ventricosus, ad basin leviter rarinatus, antice descendens ; sutura 

 simplex ; apertura oblongo-ovata, parum coarctata, ad basin acuta, 

 alba. Operculum oblongo-ovatum, testaceum, crassum, concentrice 

 striatum. 



Alt. 5-5, diam. 4-75 mm. 



Aperture: alt. 3, diam. 2 mm. 



Hab. Ceylon ; Nilgherries. 



'* This species has some characters of Stenoihyra. The last 

 whorl is unusually great, the mouth somewhat contracted, but 

 the general aspect is that of Bithynia" 



Nevill gives the following variety as new, but without other 

 description than the mere name (Hand List Moll, in Ind. Mus., 

 Calcutta, pt. 2, p. 37) : 



Var. biangulata. 

 Hab. Madras. 



155. Bithynia troscheli (Paascli). 



Bithynia troscheli (Paasch), Archiv fur Naturg., Berlin, 1842, 

 p. 300, pi. 0, iigs. A-D (as Paludina). 



Paludina similis, Boll. Moll. Arch. Yer. Freunde Nature, Mecklen- 

 burg, v, 1851, p. 102; Nevill, Hand List, pt. 2, p. 40. 



Shell small, ovately fusiform; whorls 4-5, convex; suture 

 rather deep ; labrum continuous ; aperture ovate. 



Alt. 5-5, diam. 4-25 mm. 



Hab. Europe ; Kashmir. 



"All the Kashmir specimens are decollate; the whorls are 

 even more convexly rounded than usual." (A'evill.) 



Subgenus FOSSARULUS. 



Fossarultis, Neuinayr, Jahrb. Geol. Beichs. Anst., Wien, 1809, 

 p. 361. 



TYPE, F. stachei, Neumayr : Miocene of Dalmatia. 

 llancje. India. 



