HELIX. 



143 



Helix elevata. 



curved tooth ; umbilicus covered. Greater diam. Fig. 243. 



25, lesser 20 ; height 7 mill. 



Helix elevata, Say, Journ. Acad. Phila. II, 154 



(1821) ; American Conchology, No. 4, pi. 



xxxvii, f. 2 (1832) ; Binney's ed. 27, pi. 



xxxvii, f. 2; ed. Chenit, Bibl. Conch. Ill, 48, 



pi. xiii, f. 2, a. — Binney, Bost. Journ. Nat. 



Hist. I, 490, pi. xix (1837) ; Terr. Moll. II, 



126, pi. iv.— Leidy, T. M. U. S. I, 256, pi, x, f. 4, 5 (1851), anat.— 



DeKay, N. Y. Moll. 36, pi. iii, f. 20 (1843).— Mks. Gray, Fig. Moll. 



An. pi, cxci, f. 7, no descr.— Pfeiffer, Sjmb. Hist. Hel. II, 27 ; Mon, 



Hel. Viv. I, 317 ; in Chemnitz, ed. 2, I, 56, pi. vii, f. 11, 12 (1846).— 



Reeve, Con. Icon, no. 681 (1852).— Deshayes in Fer. I, 329. 

 Helix tennesseensis, Lea, Trans. Am. Phil. Soc. IX, 1 ; Obs. IV, 1 (1844) ; 



Proc. II, 31 (1841) ; Troschel's Arch. f. Nat. 1837, II, 124. 

 Helix knoxvillina, Ferussac, Hist. pi. xlix, f. 5, 6. 

 Xolotrema elevata, Tryon, Am. Journ. Conch. Ill, 48, pi. ix, f. 1 (1867). 



From Georgia to Wisconsin ; from New York to Missouri ; 

 not east of the Alleghanies. Also in the postpleioceae of the 

 Mississippi Yalley. 



There is a form furnished with a brownish, revolving band 

 upon the body-whirl. 



Helix Clarkii, Lea. — Shell imperforate, globosely- rounded, regu- 

 larly and finely striated, reddish horn-color; spire 

 obtusely conic; whirls seven, convex, with delicate F'?- -"14. 



incremental striae, the last one very globose and 

 rounded below ; aperture lunate ; peristome white, 

 thickened, reflected, its basal termination quite 

 heavy and covering the umbilicus entirely ; one 

 elongated, white denticle on the parietal wall of the 

 aperture. Greater diam. 14, lesser 13 ; height 9 mill. 

 Helix clarkii. Lea, Proc. Acad. Nat. Sci. Philad. 



1858, 41 ; .Tourn.— ; Obs. XI, 138, pi. xxiv, 



f. 111.— W. G. Binney, Terr. Moll. IV, 53, pi. 



ixxvii, f. 10. 

 Xolotrema clarkii, Tryox, Am. Journ. Conch. Ill 



48, pi. ix, f. 2 (1867). Helix clarkii, enlarged. 



Cherokee County, N. C. ; also in Georgia. 



The lower figure was photographed on to the wood. 



