422 NEW GENUS AND SOME NEW SPECIES 



As it was described previously by Le Sueur's name ^^pli- 

 cata," this must take precedence. Its habitat, Peru, I think 

 very doubtful ; it most probably came from the United States. 

 U. rariplicata. This is, no doubt, a variety of the above. 

 U. purpurata. The recta answers to this description in 

 every respect but the habitat. The author "believes" it 

 came from Africa. The shell most probably came from the 

 United States, in w^hich case there could not be a doubt. 



f The description of these is so imper- 

 fect that I cannot identify either of them, 

 although they are all from this country, 



U. li^amentma 



^^ . ^ ' ; and the same species most probably in 



our cabinets. I doubt if either of them 



^ should be retained. 



ZZ rari sulcata, i m • +• <• ^.i, 



rr . - f 1 hese are mere varieties ot the com- 



IJ. coarctata, > , , 



rj ' ( planatus. 



U. purpurascens. ) ^ 



U. rodiata. Our author gives the Mya radiata of Gmelin 

 and U. ochraceus of Say as synonymes to this species. It 

 cannot be both ; for the ochraceus is a perfectly distinct spe- 

 cies from the M. radiata, which, Chemnitz says, comes 

 from the rivers of Malabar. The radiatus described by 

 Barnes after Lamarck, and Say's ochraceus are distinct spe- 

 cies, and I have no doubt the Mya radiata of Gmelin is 

 distinct from both. Mr Say's figure, referred to by Mr 

 Barnes (pi. 2, fig. S, Am. Conch.) as U. radiata, is undoubt- 

 edly an ochraceus. (See note on U. radiatus.^ 



U. hrevialis. This shell is pictured by Crouch ; it is thick, 



and resembles the circidus of the Ohio, but is larger, less 



round and radiated. It comes from the Isle of France, and 



is, no doubt, a distinct species. 



U. rhomhida, ) * n • ^- r ^i 



rr • -^ f Are all mere varieties oi the com- 



(J. carimfera, } , , 



rr ■ \ planatus. 



v. georgina, ) ^ 



U. clava. I cannot identify this species. The descrip- 

 tion is too short. Its habitat is Lake Erie and Nova See- 



