60 HELICE.A. 



I have specimens of this species from the following 

 additional States, — Pennsylvania, Georgia, Louisiana. 



HELIX RUGEIiI Shuttleworth vol. iii. p. 18, pi. Ixxviii. fig. 15. 



Helix Rugeli Shuttleworth, Bern. Mittheil. 1852, p. 198. 

 Pfeiffer, Mon. Hel. Viv. iii. 268. 



I am indebted to Bishop Elliott for specimens of this 

 shell. It is in most respects similar to the preceding 

 species, and would be mistaken for it unless the aperture 

 be examined. The position of the upper tooth of the 

 peristome far within the aperture at once distinguishes it. 

 The size is not, however, any criterion, as I have individ- 

 uals of Rngeli only 10 millimetres in diameter, while 

 some of my specimens of injiecta are full 13 millimetres. 



The plate shows an enlarged view of the aperture. 



HEIilX MONODON Rackett vol. ii. p. 147, pi. xli. 



Helix monodon DeKay, N. Y. Moll. p. 35, pars., excl. syn., pi. iii. fig. 19 — not 

 fig. 21, a. b. 

 Mrs. Gray, Fig. Moll. An. pi. 193, fig. 11. (Ex. Best. Journ. 



ahs. desc.) 

 Billings, Canadian Nat. ii. 100, fig. 6. 

 IMix convexa Chemnitz, pars. (excl. syn. et tab. Ixvi. figs. 24, 27). 

 Pfeiffer, 1. c. iii. 268, (excl. (3 et y). 

 Desha YES, Lam. 3d ed. iii. 308; in Fer. 1. c. i. 144. 

 Reeve, Con. Icon. No. 696 (1852), excl. syn.; No. 717, (1854). 

 Helicodonta hirsiita a. Ferussac, Tabl. Syst. 101. 



VAR. FRATERNA Say. 



Helix fraterna Say (Binney's ed.) p. 30, pi. Ixxiv. fig. 3. 



Mrs. Gray, Fig. Moll. An. pi. 193, fig. 5 absq. desc. (Ex. Bost. 

 Journ.) 

 Helix monodon DeKay, 1. c. ex parte, pi. iii. fig. 21, a, b. 



Wood, Ind. Suppl. vii. 15. 

 Helix convexa Chemnitz, ed. 2. i. 86, ex parte. 

 Var. Reeve, Con. Icon. 1. c. 

 (i Pfeiffer, 1. c. 



VAR. LEAH Ward. 



Helix convexa y Pfeiffer, 1. c. 



Var. Chemnitz, 1. c. pi. Ixvi. figs. 24, 25. 



