HELIX. 



115 



Helix edgariana, Pfeiffer, Mon. Hel. Viv. I, 425. — Bixney, Terr. Moll. 

 II, 155, pi. xli7, f. 2.— Reeve, Con. Icon. 703.— W. G. Binney, Terr. 

 Moll. IV, 65.— Bland, Ann. N. Y. Lye. VII, 428, pi. iv, f. 18. 



Stenotrema edgariana, Tryon, Am. Journ. Conch. Ill, 59, pi. ix, f. 27 

 (1867). 



Tennessee, Alabama, Arkansas. 



H. edgariana differs from H. spinosa in the following particu- 

 lars: it is smaller, more elevated, and more convex beneath. 

 In form the parietal tooth is most like that of H. stenotrema, 

 while that of H. sjomosa is more nearly allied to that usually 

 prevailing in H. hirsuta. The whirls of H. spinosa are flattened 

 and exserted, the carinated edges of all being seen, but in H. 

 edgariana the upper whirls are rather convex, and defined by a 

 well-marked suture. Traces of hairs rarely exist at the base of 

 H. spinosa, and no scars indicating their presence are visible on 

 dead or denuded shells, whereas in H. edgariana there are distant, 

 short, prostrate hairs, with strongly marked scars on the shell. 

 Fresh or young specimens have no doubt the cilia, as in H. 

 spinosa. 



Cat. No.iNo. ofSp. 



Locality. 



From whom received. 



Kemarks. 



8634 



W. G. Binney. 



Cab. serie.s. 



Fig. 193. 



Helix edTardsi, Bland. — Shell imperforate, lenticular, carinate, 

 the carina obsolete near the aperture, rather thin, beneath the epidermis 

 pale brown ; the epidermis dark chestnut-color, with numerous minute 

 curved hair-like processes lying flat upon, and attached to the epidermidal 

 surface of the upper whirls in the direction of the incremental 

 striae, the epidermis at the base covered with acute, raised, 

 transverse tubercles, most numerous, and having erect bristles 

 near the aperture ; spire convex- conoid ; whirls five, flattened, 

 gradually increasing, the last gibbous above, suddenly but 

 slightly deflected ; apex minutely granulate ; base convex, 

 little indented in the umbilical region, and with impressed 

 spiral lines beneath the epidermis ; suture deeply impressed ; 

 aperture oblique, transverse, auriform, narrowed by a slender 

 slightly arcuate, lamelliform parietal tooth extending across 

 from the umbilical axis, and terminating with a short angular deflection 

 within the aperture ; upper margin of the peristome acute, scarcely re- 

 flected, and partially appressed to the body -whirl, with a tooth-like callus 

 within, having an almost obsolete notch in the centre ; with an internal 

 transverse tubercle on the base of shell. Greater diam. 9, lesser 8 ; height 

 5 mill. 



