HELIX.— Plate CXX. 



Pfeiffee, Pro. Zool. Soc. 1845, p. 132. 

 Hah. Texas. 



Of a liyaline ytillowish-white sul)stauce, only faintly 

 -triated, witli a prolonged triangular tooth on thf: body- 

 whorl. 



Species 713. (Mus. Cuming.) 



IIki.i.\ Dorfeuillean.\. Hel. testa umbilicald, iiilitld, 

 rufo-comed, nupertii brevisnimi cuuoided, plicato-Htria- 

 td, iriferni aubiujlald, lievigatd ; anfract'dius ijui/ique 

 ad sex, conveximculis, ultimo antice vix ile/lexo ; 

 aperturd laajusculd, interdum detite in pariele aper- 

 iiira/i ; perisiomate reflexo, alio, dentibus duoius inar- 

 ijinalibus intus munito. 



Dokfeuille's Helix. Shell umbilicatcd, shining, n-il- 

 dish-homy. very shortly conoid at thi; upper part, 

 phcately striated, somewhat intlatcd and smooth at 

 the lower ; whorls five to six, rather convex, the last 

 slightly deflected in front ; apcrtun- ratht-r large, 

 sometimes with a tooth on the wall of tin- aperture; 

 lip reflected, white, furnished interiorly with two 

 marginal teeth. 



Lka, Observations, vol. ii. p. 1IJ7. pi. 24. f. 118. 



Hab. Ohio, North America. Honduras ; Dyson. 



The specimen here figured has no teeth on the inner 

 wall of the aperture, it being a« commonly absent as 

 present. 



