AND OTHER FAMILIES. 229 



SucciNEA RETUSA. Plate XIX. fig. 86. 



Testa ovato-oblongd, tenuissima, pellucidd, flavidula ; spira brevi; anfractibus 

 ternis ; aperturd inferne dilatatd et retractd. 



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. 



60 



