128 Chusan Shells. [No. 2. 



LlMNAEA PLICATTJLA, BeilSOIl. 



Testa elongato ovata, cornea scabriuscula, anfractu ultimo trans- 

 verse plicatula, suturis impressis ; spira mediocri, apice acuto ple- 

 rumque ferrugineo ; apertura infra patulante, basi evasa. 



This shell differs scarcely in shape from a Limnaea (X. rniscella* 

 nobis) common in the [Rivers of R-ohilkhund and in the River 

 Goomty, which approaches in some of its characters very nearly to 

 one of the varieties of Z. chlamys. The present species may be 

 distinguished from L. miscella by the want of polish, by the more 

 deeply impressed sutures, by the slight plications on the last whorl, 

 and by its coloured apex. 



" Found in fresh water ponds, floating on the surface, or attached 

 to Chara. L. plicatula is common." 



Limnaea minor, Benson. 



Testa ovato-acuta, cornea, polita, spira vix dimidium testa? effor- 

 maute ; apice obtusiusculo, anfractibus quatuor, suturis leviter im- 

 pressis ; apertura ovata, plica columella? obsoleta. 



This very distinct shell was among the specimens of the last de- 

 scribed species. The specimen under review is a small shell, and 

 intermediate in form between the English L.fossaria (minuta, Lam. 

 truncatula, Gray) and the large species of our Western Provinces, 

 L. bulla, which again is nearly allied to the Bengal species L. luteola 

 of Lamarck. From L. bulla it differs in its comparatively greater 

 length of spire ; from L.fossaria by the shorter spire and slightly 

 excavated sutures. 



BttlljEA cattrina, Benson. 



Testa ovato-oblonga, alba, tenuissima, papyracea, transverse elegan- 

 ter minutissimeque striatula ; apertura auriformi supra angustata, 

 infra patulante ; labro apicem superante ; spira nulla. 



The part of the body-whorl which is visible when the aperture is 

 turned towards the observer, is small in proportion to the mouth. 

 The summit of the shell resembles the same part in Bulla navium 

 and B. solida, but the outer lip is destitute of the fold where it rises 

 above the apex, which appears in those species ; resembling, in this 

 respect JB. ampulla. The thinness of the inner lip locates this shell 

 in Bullcea. Its being internal, probably accounts for the state of 



