48 



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



Locality. 



Mohawk, N. Y. 



Vermont. 



Lyuu, Mass. 



Apple Creek, lat. 47°. 



Big Sioux. 



Mo. of the Yellowstone. 



Big Sioux. 



Otter Tail Creek, Min. 



Upper Mackenzie. 



Great Slave Lake. 



Wriiiht's L . Cal. 



Klamath Marsh, 0. 



Rhett L., Cal. 



B"iiicia. [pine. 



Yukron, mo. of Porcu- 



From whom received. 



Remarks. 



Dr. Lewis. 



J. E. Chittenden. 



Dr. Prescott. 



Dr. J. S. Newberry. 



Dr. J. S Newberry. 

 R. Kennicott. 



nuttalliana, teste Lea. 



nuttalliana, teste Lea. 



L.illiuaea proxinaa. Lea. — Shell acutely conic, rather thin, closely 

 and irregularly striated, horn-colored, minutely perforated ; 

 Fig. 67. spire sub-elevated, sharpened at the apex ; sutures deeply 

 impressed ; whirls seven, convex ; aperture sub-inflated, sub- 

 elliptical, banded within, columella slightly plicate. 

 Arroya San Antonio, California : Dr. Trask. (Lea.) 



Limnsea jnoxima, Lea, Proc. Ac. 

 (1856). 



Nat. Se. Phila. VIII, 80 



The above is Mr. Lea's description. Fig. 67 is 

 drawn from No. 9204 of the collection, determined 

 by bim. The rapid enlargement of the whirls in 

 width appears to be the chief characteristic of this species. 



Lriinn%a desidiosa, Say.— Shell oblong sub-conic ; whirls five, 

 very convex, the fourth and fifth very small, the second rather laige, 

 suture deeply indented; aperture equal to or rather longer than 

 the spire ; labium, calcareous deposit copious, not perfectly 

 appressed at base, but leaving a very small umbilical aperture. 

 Inhabits Cayuga Lake. Length 7-10 of an inch. ' 

 Found by Mr. Augustus Jessup. It is closely allied to L. 

 elodes, but the whirls are more convex, one less in number, and 

 the two terminal ones are proportionally smaller ; the callus of 

 the labium, also, near its inferior termination, is applied still 

 more closely to the surface of the body whirl. {Say.) 

 Limnsea desidiosa, Say, Joutn. A. N. S. II, 1(59 (1821) ; Long's Ex. II, 



' See remarks under L. humilis. 



