North American Ilelicidm. 39 



Island to Mr. Postell, and from St. Augustine, Florida, to Mr. 

 Dorman. 



Helix leporiiia Crould. 



Synonymy. 



Helix leporina Gould Proc. Bost. Soc. N. H. p. 39, 1848. 



" Binney Terr. Moll. II. p. 199, pi. xl. a fig. 1, 1851. 



" Reeve Conch. Icon. No. Y22, 1852. 



pustula Pfr. var. Mon. Ill, No. 1575, 1853. 



The following is a co^^y of Dr. Gould's description : 



"H. LEPORIXA. 



" T. parva, lenticular), liicida, rufo-cornea, pilosiusculd, leviter striata, 

 vix perforata; spira depressa, anfr. 5, convexiusculis, ultimo superne 

 subangulato ; regione umbilicali excavato ; apcrtura lunata, labro incum- 

 bente, reflexo, roseo, dentes duos albos sinum amplectentes gerente ; 

 lamella columellari obliqua, alba, erecta, acuta, rectangulari, callo linear! 

 superne ad angulum aperturie juncta. Diam. \, alt. ^ poll. Hab. Mis- 

 sissippi and Arkansas. 



"Intermediate between H. hirstita and JI. injlecta, thougb smaller than 

 either. It is less globose than hirsuta, while the aperture is much the 

 same, except that the sinus of the lip is formed by the projection of two 

 teeth instead of by an emargination, in this respect resembling IT. injiecta. 

 From the latter it differs in the columellar tooth. It resembles If. pus- 

 tula still more, but the umbilical region wants the peculiar channel of 

 that species." 



Pfeiffer states, in his before-mentioned letter to Mr. W. G. 

 Binney, that he now thinks this species distinct from JI. pustula 

 Per. 



Keeve remarks, — "It has been much doubted whether this 

 and IT. pustula are not varieties of the same, still the smaller 

 shell has the larger umbilicus." He gives as habitat, Ten- 

 nessee. 



M. leporina is larger than 11. pustula^ less elevated, the 



