North American Helicidoe. 279 



lete, are observable at the base of the former, while in the 

 latter, the basal epidermis approaches in character to that of 

 H. palliata Say. The deep characteristic notch in H. hirsuta 

 is considerably less developed in H. JEdvardsi, and the callus 

 which connects the parietal tooth with the upper margin of 

 the peristome in the former, does not exist in the latter. In 

 the general character of the peristome the species under consi- 

 deration resembles H. hirsuta, while H. barbigera is in that 

 particular more appropriately compared with H. fratema Say. 

 "While naming this species after my friend Mr. Edwards, 

 who collected, it, I am quite aware of the objections to such, 

 specific names, but in the Genus Helix it seems almost a hope- 

 less case to find, for a shell closely allied to several others, an 

 unpreoccupied name derived from any distinct specific cha- 

 racter. 



2.— Helix sculptilis. 



Plate IX. Fig. 11-13. 



T. obtecte perforata, suborbiculari, depressa, subpellucida, pallide 

 cornea, nitenti, lineis transversis regularibus concinne irnpressa ; spira 

 parum elevata, subconvexa. ; anfr. 7, planulatis, ultimo rapide accres- 

 cente, prope aperturam £ diam. subsequanti ; basi planulata, leviter 

 excavata ; sutura parum irnpressa ; apertura subobliqua, depressa, trans- 

 versa, lunari ; perist. simplici, acuto, sinuato, margine columellari 

 rapide et anguste refiexa, et perforationem minutam tegenti. 



Shell scarcely perforate, suborbicular, depressed, subpellucid, 

 pale horn color above, of lighter shade beneath, shining, with 

 regular, subequidistant, impressed transverse lines, those on 

 the last whorl extending over the periphery, and converging 

 in the umbilical excavation ; spire very little elevated, scarcely 

 convex ; whorls 7, planulate, the last rapidly increasing, equal 

 at the aperture to ■£■ the diam. of the shell, beneath flattened, 

 and little excavated in the umbilical region ; suture lightly 



FEBKU ABT, 1858. 20 Aira " Lm Nat- HIaT • VoL * VI 



