NortJi Arnurican Selicidce. 3 



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

 latter, the basal epidermis approaches in character to that of 

 H. 'palliata Saj. The deep characteristic notch 'in II. Jdrsuta 

 is considerably less developed in II. EdvaTclsi., 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 nnder consi- 

 deration resembles II. hirsuta^ while H. harhigera is in that 

 particular more appropriately compared with. II. fratorna 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. 



3.— Melix sculptilis. 



Plate IX. Fig. 11-13. 



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

 coi'nea, nitenti, lineis transversis regularibus concinne impressa ; spira 

 parum elevata, subconvexu ; anfr. 7, planulatis, ulrtmo rapide accres- 

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

 excavata ; sutura parum impressa ; apertura subobliqiia, depressa, trans- 

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

 rapide et anguste retlexa, 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 Y, 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 



