HELIX. 



Ill 



hirsute. It differs widely from both in the character of the um- 

 bilicus ; the aperture is much like that of pusiula, but more 

 narrow than that of leporina. The inferior tooth on the peri- 

 stome is more developed laterally than in H. pusiula — indeed it 

 has a somev/hat bifid appearance, in which respect it is more 

 allied to H. leporina. 



The fulcrum in H. pustuloides is of the same nature as that 

 in H. leporina, but less developed, and with the outer edge entire. 



Helix leporina, Gould. — Shell with a partially covered umbilicus, 

 depressed, orbicular, thin, reddish horn-color, delicately striated, and, when 

 fresh, having a delicate down on its surface ; spire depressed, composed of 

 five slightly convex whirls, the last of which is obtusely angular at its 

 upper portion ; base convex, excavated at the umbilical 

 region, with a minute, partially covered umbilicus ; aperture 

 oblique lunate ; peristome incumbent, rose-colored, reflexed, 

 bearing on its dilated basal edge two expanded teeth sepa- 

 rated by a deep, narrow fissure, its terminations joined by a 

 quadrate, erect, oblique lamella, whose upper edge is joined 

 to the upper angle of the aperture by a thread-like callus ; 

 an internal, fulcrum-like tubercle, with uneven outer edge, 

 on the base of the shell. Greater diam. G, lesser 5^ ; height 

 3 mill. 



Helix leporina, Gould, Proc. Bost. Soc. Ill, 39 (1S4S) ; in Terr. Moll. II, 



199, pi. xl, a, f. 1.— -Reeve, Con, Icon. 722 (1852).— Bland, Ann. 



N. Y. Lye. VI, 348 (1S5S).— W. G. BiNxXey, T. M. IV, 92.— Pfeiffer, 



Mon. Hel. Viv. IV, 320, no descr. 

 Helix pustula, Pfeiffer, Mon. Hel. Viv. I, 70, descr. : var. S ; HI, 268, 



not of Ferussac. 

 Dcedalochila leporina, Trton, Am. Journ. Conch. Ill, 61, pi. x, f. 1, 4 



(1867). 



Indiana, Illinois, Arkansas, Mississippi, Georgia. 



H. leporina is larger than H. pustula, less elevated, the whirls 

 are less convex, the incremental stria? less numerous and distinct, 

 and the aperture is wider. The umbilicus is more nearly covered 

 by the peristome, and is without the groove which prevails in 

 piustula. Within and near the aperture, there is what may be 

 called i\i& fulcrum, extending from the floor of the last to that of 



