92 DESCRIPTION OF NEW 



Paludina Nickliniana. Plate XXIII. fig. 109. 



Testd turritd, viridi, Icevi; apice obtuso ; anfractibus quaternis, convexis ; aperturd ovatd. 



Shell turrited, green, smooth; apex obtuse ; whorls four, convex; aperture ovate. 



Hab. Hot Springs, Virginia. P. H. Nicklin. 



My Cabinet. 



Cabinet of Mr Nicklin. 



Diam. 2-20ths, Length 3-20ths of an inch. 



Remarks. — This shell, with several other species, was brought by 

 Mr Nicklin from the Hot Springs of Virginia, and kindly placed in 

 my cabinet. It lives in a rivulet, whose channel is supplied by the 

 waters of a hot and a cold spring. The Physa aurea inhabits the same 

 stream. It is the smallest species I know in our country, except the 

 granosa of Say. It is rather larger, and very much resembles the vi- 

 ridis (Lam.). Its habitat, however, is very diflferent, as the viridis 

 lives in "cold fountains." 



Melania Troostiana. Plate XXIII. fig. 86. 



Tesid elevatd, fused, muUisiriata ; apice acuto ; anfractibus decern, suprii carinatis ; aper- 

 turd ovatd. 



Shell elevated, brown, thickly striated ; apex acute; whorls ten, above carinate; 

 aperture oval. 



Hab. Mossy Creek, Jefferson County, Ten. Professor Troost. 



My Cabinet. 



Cabinet of Professor Troost. 



Cabinet of Mr Hydco 



Diam. -5, Length 1'2 inches. 



RemarJis. — I owe to Professor Troost this interesting species. It 

 differs from any American species with which I am acquainted, in hav- 



