of North American HeliddoB. 105 



< Helix spino§a JLca. 



This well known species varies in size. Large specimens 

 from Alabama and the Cumberland Mountains, Tenn., are 

 much depressed above and little convex beneath ; they measure, 



Diam, maj. 14, min. 13, Alt. 5 mill. 



A small var. from the Look Out Mountains, Tenn. (2000 ft., 

 Bp. Elliott !), is proportionately more elevated above, and more 

 convex at the base, measuring, Diam. maj. 12, min. 11, Alt. 5 

 mill. 



Helix Edg^ariana liCa. 



Plate IV. fig. 18. (Twice iiat. size.) 

 This was described by Lea in the following terms : 

 Caracolla Edgariana. 



T. supra subplana, subtus convexa, rufo-fusca, enormiter striata, imper- 

 forata ; spira brevi ; suturis vix impressis ; anfr. 5 planulatis, aperturS. 

 angustissima ; columella dentem unicum longum et laminatum habente; 

 labro incrassato, in medio incise. 



Shell nearly flat above, beneath convex, reddish-brown, irregularly 

 striate, imperforate ; spire short ; sutures scarcely impressed ; whorls 5, 

 flattened ; aperture very narrow ; columella furnished with a long 

 lamellar tooth ; lip thickened, in the middle notched. 



Hah. — Cumberland Mountains, Tennessee. Diam. .40, length .20 inch. 



Remarks. — Among a number of Helices taken by Mr. Edgar were 

 three specimens of this species, which do not seem to have been before 

 observed. The carina is sharp. The form of the aperture is that of H. 

 hirsuta Say, except that the superior and thick part of the lip joins the 

 tooth of the columella; on the surface of the shell there is no hirsute 

 character. Several specimens of the hirsuta accompanied them, all of 

 •which presented their usual globose character. It difi'ers from C. spi- 

 nosa Nob., in being smaller, less flattened, and being without the cilia. 

 {Froc. Am. Phil. Soc, II. 31. Trans. Am. Phil. Soc. IX., p. 2.) 



To. Dr. Binney's remarks on S. spinosa Lea (Terr. Moll. IL, 

 155), Dr. Gould adds the following: 



