32 



LAND AND FRESH-WATER SHELLS OF N. A. [PART L 



by a deeply impressed suture, the outer one disproportionately large, 

 somewhat declining as it approaches the aperture, and ob- 

 Fig. 35. tusely angular at the periphery, beneath excavated around 



a broad, crateriform umbilicus, in which the whirls are 

 displayed to the apex ; aperture oblique, lunate ; peristome 

 simple, its basal margin arcuate. Greater diam. 7|, lesser 

 6, height 3| mill. 



Helix vitiJd, MiJLLER, Hist. Verm. II, 32, &c. — Pfeiffer, 



Mon. 11, 94. 

 Helix lucida, Draparxaud, Moll. Fr. 103, pi. viii, f. 11, 

 12.— BiNNEY, Terr. Moll. II, 233, pi. xxii, a, f. 2.— 

 W. G. BiNNEY, Terr. Moll. IV, 116. 

 Fig. 36. Helix hydrophila, Ingalls in coll., unpublished. 



Hyalina nitida, Tryon, Am. Journ. Conch. II, 250, pi. iv, 

 f. 24 (1866). 



An European species, found at Great Slave Lake, 

 Fort Resolution in British America, and in New 

 York and Ohio. Fig. 36, copied from Moquin- 

 Tandon, represents a specimen from France. 



Hyalina Wliitiieyi, Newcomb. — Shell umbilicated, greatly de- 

 pressed, thin, smooth, scarcely marked by the delicate 



Fig. 37. wrinkles, shining, smoky horn-color ; spire slightly elevated ; 



^^^^fek whirls four, flattened, the last planulate above and below; 

 umbilicus broad, pervious ; aperture transversely subcircular; 

 peristome acute, simple. Greater diam. 5A, lesser 4J ; height 

 2 mill. 



Helix whitnet/i, Newcomb, Proc. Cal. Acad. Nat. Sci. Ill, 



118 (1864). 

 Patula whitneyi, Tryon, Am. Journ. Conch. II, 263 (1866). 



In the Sierra Nevada, near Lake Tahoe, California, under 

 damp logs and bark. 



Cat. No. 



No. of Sp. 



Locality. 



From whom received. 

 Dr. J. G. Cooper. 



Remarks. 

 Type figured. 



