1836.] in the Society's Museum. 747 



ally, occasionally shewing the characters of more than one variety 

 combined in the same shell, that no doubt remains of their blending 

 in one species. In Tolly's Nullah I took larger specimens than any 

 in the collection ; though at least four twists of the spire were defec- 

 tive, one individual measured 3.4 inches in length. The Gumti spe- 

 cimens are less liable to truncation, and in young specimens the 

 apices are nearly perfect. I have not observed more than 12 whorls 

 present in any specimen. I described the type of the species without 

 a name as species A* in the 13th No. of the Gleanings in Science. It 

 was figured as No. 7, in Plate VII. vol. i. 



30. Melania Stephanus. Testa, ovato-conica, gradata, plerumque 

 deinde truncata globoso-ovata, olivacea anfractibus obsolete fasciatis, 

 transverse sulcatis, superne planulatis, spiris brevibus validis coro- 

 natis ; apertura albida subrotundata, superne fere angulata ; labro 

 subdenticulato. 



This shell, which is very solid, approaches in form to M. Amarula, 

 but differs from it in the configuration of the aperture, and in the 

 comparative shortness of the whorls, as well as by the denticulations 

 on the inner edge of the lab rum. Among the numerous specimens 

 which I had an opportunity of inspecting, only a single individual 

 was perfect, and the greater number exhibited only two whorls, the 

 remainder being truncated. This character I find to be an usual indi- 

 cation of habitation in stagnant water. The sulcations on the whorls 

 are sometimes obsolete. 



31. Melania zonata. Testa ovato-conica, laevi, longitudinaliter 

 striata, olivacea, zonis tribus brunneis fasciata; anfractibus leviter 

 convexis, suturis minime profundis ; apertura albida ovato-oblonga 

 infra subangulata. Long. 0.85 poll. 



This a very distinct and pretty species, with a strong epidermis^ 

 It is generally eroded at the apex. 



32. Melania Terebra. Testa elongato-turrita, olivaceo-brunneav 

 Isevi, polita; anfractibus tumidis ; suturis excavatis ; sinu inter basin 

 labri columellamque nullo. Long. 1.05. Testa truncata. 



It is distinguished from the young of the smooth variety of M, 

 variabilis by the want of angularity at the centre of the lower whorl,, 

 by its polished epidermis, more tumid whorls and more deeply sunk 

 sutures, as well as by the absence of the sinuation of the inner lip 

 which characterizes that species. The apex of the shell is more or 

 less truncated. 



33. Melania conica, Gray? Testa solida, globoso-conica, longitudi- 

 naliter striata plerumque transverse obsolete sulcata ; anfractibus, ultimo 

 ventricoso ceeteris rapide diminutis ; suturis bene signatis ; apertura* 



