AND OTHER FAftflLIES. 117 



SucciNEA RETi sA. Plate XIX. fig. 86. 



Testa ovato-oblonga, lemiissima, pclhicidd, Jluvidula ; spirn brevi ; anfradibus 

 ternis ; aperltird in/erne dilutald ct relructd. 



Shell ovately oblong, very thin, pellucid, yellowish ; spire short ; whorls three ; 

 aperture below dilate and drawn back. 



Hab. Ohio, near Cincinnati. T. G. Lea. 

 Diam. -3, Length -7 of an inch. 



Remarks. — A single specimen only of this species has come into my 

 possession. It differs so much from any of the described species, in 

 the dilatation and retraction of the inferior part of the aperture, that I 

 have not hesitated to consider it new. 



VOL. V. — 2 F 



