OF THE UNITED STATES, 169 



for examination by my friends Messrs. Collins and 

 Barnes, of New York. It was found in Lake Supe- 

 rior, by Mr Schoolcraft. 



Since writing the above, Mr. Jessup presented mc 

 with several specimens, which he collected in Ca- 

 nandaigua and Cayuga lakes. 



5 L *elodes, Shell oblong conic, gradually acu- 

 minated, reticulate ^vith transverse lines and longitu- 

 dinal wrinkles ; whirls rather more than six ; spire 

 acutely terminated ; suture moderately impressed ; 

 aperture shorter than the spire ; Zaferura, inner sub- 

 margin reddish obscure; labium, calcareous deposit 

 rather copious, not appressed at base, but leaving a 

 linear umbilical aperture ; body ivhirl on the back 

 longer than the spire. 



Inhabits Canandaigua Lake. 



Var. a. Whirls simply wrinkled across, the cal- 

 careous deposit 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. 



6. L. *desidiosus. Shell oblong sub-conic ; whirls 

 five, very convex, the fourth and fifth very small, the 

 second rather large ; suture deeply indented ; aper- 

 ture equal to or rather longer than the spire 5 la- 



22 



