ii 



LAND AND FRESH-WATER SHELLS OF X. A. [PxVRT II. 



Ivimuaea. Itaydeiii- — Shell ovate conic, smooth, thin, light honi- 

 colored, imperforate ; spire rather short ; whirls five, convex ; 

 Fig. 59. sutures deeply impressed; aperture ovate ; columella strongly 

 plicate. 



Yellowstone and Big Sioux : Dr. Hayden. (Lea.) 

 Limnaea hiydeni, Lea, Proc. Acad. Nat. Sc. PLila. 1S58, 16C. 



I was at first inclined to place this species in the ' 

 synonymy of Limnaea refiexa. "Upon more careful 

 examination of the specimens collected by Dr. Hay- 

 den (one of which is here figured), I am satisfied 

 of its being distinct. Its rounded whirls and strongly 

 plicate columella are its chief characteristics. 



Locality. 



Yellowstone River. 

 Ruby "Valley. 



[River. 

 Mo. of the Yellowstone 

 Big Sioux. 



.30 in. w. of Ft. Kearney. 

 Bet. PikeL.& Ft. Union. 

 Mo. of Yellowstone. 



From whom received. 



Capt. J. H. Simpson, 

 Army of Utah. 



Gov. J. J. Stevens. 



Remarks. 



Original lot named bv 

 [I. Lea". 

 "Swamps." 

 " In alluvial." 

 Named by I. Lea. 



Cabinet series. 



Fig. 60. 



Limnaea palustris, MiJLL. — Shell oblong conic, gradually acumi- 

 nated, reticulate with transverse lines and longitudinal wrinkles ; whirls 

 rather more than six ; spire acutely terminated ; suture 

 moderately impressed ; aperture shorter than the spire ; la- 

 brum, inner sub-margin, reddish obscure ; labium, calcareous 

 deposit rather copious, not appressed at base, but leaving a 

 linear umbilical aperture ; body whirl on the back longer than 

 the spire. 



Inhabits Canandaigua Lake. 



Var. a. Whirls simply wrinkled across, the calcareous de- 

 posit at base appressed to the surface of the whirl. 



This species was found by Mr. A. Jessup ; it bears the most 

 striking resemblance to L. palustris. The variety was found 

 by the same enterprising mineralogist at Morristown, New 

 Jersey. I have subsequently received specimens from Mr. S. B. Collins, 

 of New York, who procured them in a marsh near the Saratoga Springs. 

 (Say, J. A. N. S.) The fold of the columella is much more profound 

 than that of u?nbrosus. (Say, Am. Conch.) 



Helix palustris, Muller, &c., Rackett, Tr. Linn. Soc. XIII, 42 (1822). 

 LimnsRus elodes, Say, Journ. Ac. Nat. Sc. Phil. II, 159 (1821); Am. Conch. 

 IV, pi. xxxi, f. 3 (1832) ; Bixney's ed. 66, 188, pi. xxxi, f. 3 ; ed. 

 Chenu, 44, pi. viii, f. 3.— Ku.ster in Ch. ed. 2, 42, pi. vii, f. 17-21. 

 Linma'a elodes, Gould, Inv. of Mass. 221, f. 146, 147 (1841). — Adams, 



