102 Binney on Terrestrial Mollusks. 



rounded with water, though it has been found on high lands where 

 the ground was comparatively dry. Mr. Charles B. Fuller, of 

 Portland, found them quite numerous in a grove of pines, an unu- 

 sual place for Helices to be found in. 



HELIX EXIGUA Stimpson vol. iii. p. 16, pi. Ixxvii. fig. 19. 



Helix erigua Pfeiffek, Mon. Hcl. Viv. iii. 102. 



Eelix annulata Case in Sill. Journ. May, 1847, vol. iii. p. 101; Ann. and Mag. 

 Nat. Hist. 1847, p. 338. 

 Pfeiffer, 1. c. 

 Helix striatella ]\\moY , Gouli>, Sill. .Tourn. 1. c. 276. 



I also have specimens of this shell from Canada. 



As suggested by Stimpson, (Shells of N. E. p. 55,) H. 

 exigua is identical with annulata Case, which name, being 

 preoccupied, will not stand. Gould, 1. c, declares annu- 

 lata to be the young of striatella, — an opinion he seems to 

 have withdrawn by including Stimpson's description in 

 vol. iii. He was at first rather inclined to refer the species 

 to costata (vid. note to Case's description. 1. c.) 



I have given a fac-simile of one of Case's figures, which 

 are characteristic, though rough. His description is given 

 below. Pfeiffer copies both descriptions, not having seen 

 either of the shells. 



Shell minute, much depressed ; umbilicus showing all the volutions ; 

 aperture simple and somewhat oval ; whorls four, banded by sharp par- 

 allel ribs, inclining slightly forward ; inten'ostal space marked with waved 

 lines, running parallel with the whorls ; nearly transparent ; diam. about 

 one line. 



This minute but beautiful shell was found by Dr. B. A. Stanard, in 

 the region about Lake Superior, and I have heard of its being observed 

 in other places, but so far as I can learn it is undcscribed. It diHers 

 from any description of the pulchclla I have yet met with, in having 

 uniformly an oval aperture and simple lip. The minuta of Say I believe 

 never has the parallel ribs, and is supplied with a lip. 



HELIX MINUSCULA Binney vol. ii. p. 221, pi. xvii. a. fig. 2. 



Bdix minuicula Pfeiffer, iii. 90. 

 Chemntz, ii. 112. 

 Reeve, Con. Icon. No. 731, (1852). 



