_ inhabiting the United States. 363 
15. HELIX FRATERNA. 
Plate X. fig. 2. 
testà convexiusculà imperforata, hispidulà, luteo- refiacenit, te- 
nuissimé striata; aperturà angustà ; labro albo, margine angusto, 
reflexo ; dente unico, compresso, albo, ad columellam adnato. 
Synomyms AND REFERENCES. « 
Helix fratérna, Say. Exped. to St. Peter’s River, 
IL 257. Pil. xv., fig. 3. 
Helix mónodon, Wood. Index Test. Sup. Pl. vir., 
DI 
Helix convéxa, Deshayes. Encyc. Méth., Vers, II. 
253. j a sais 
Lamarck. Anim. sans Vert., 2d edit., VIII. 
Férussac. Hist. des Moll. Pl. u., A. fig. 2. 
DESCRIPTION. 
Animal. Brownish, darker on the head, neck, and 
tentaculæ ;, foot narrow, cylindrical, nearly twice as 
long as the diameter of the shell, terminating acutely. 
Eyes black. Some individuals are of a uniform 
blackish color.. 
Shell. Slightly convex; epidermis light brown ; 
whorls about five, narrow ; aperture contracted by a 
deep groove behind the lip; lip white, narrow, re- 
flected, extending to the centre of the base of the 
shell, its outer edge not projecting beyond the surface 
of the whorl; wmbilicus covered ; umbilical region 
not much ieiinind ; ; pillar-lip with a narrow, elon- 
gated, white tooth. 
