416 APPENDIX. 



tbe pages of SilUmati's American Journal of Science, vol. vi. pp. 

 120, 259. 



XIV. 



Freshwater Shells collected iyi the Valleys of the Fox and Wisconsin, 

 in 1820, hy Mr. Schoolcraft. By Isaac Lea, Member American 

 Philosophical Society. 



A description of these shells, in which several new species are 

 established, was published by the ingenious conchologist, Mr. I. 

 Lea, of Philadelphia, in the Trcmsactions of the American Philoso- 

 phical Society J vol. v. p. 37, Plate III,, &c. 



XV. 



Summary Remarl<:s resjjecting the Zoology of the Northwest noticed hy 

 the Expedition to the Sources of the Mississippi in 1820. By Dr. 

 Samuel L. Mitchell. 



The squirrel [from the vicinity of the Falls of St. Anthony], is 

 a species not heretofore described, and has been named sciurus 

 tredecem striatus, or the federation squirrel. (A.) 



The pouched rat, or mus husarius, has been seen but once in 

 Europe. This was a specimen sent to the British Museum from 

 Canada, and described by Dr. Shaw. But its existence is rather 

 questioned by Chev. Cuvier. Both animals have been described, 

 and the descriptions published in the 21st vol. of the Medical Be- 

 pository, of New York, pp. 248, 249. The specimens [from the 

 West] are both preserved in my museum. Drawings have been 

 executed by the distinguished artist Milbert, and forwarded by 

 him, at my request, to the administrators of the King's Museum, 

 at Paris, of which he is a corresponding member. My descrip- 

 tions accompany them. The animals are retained as too valuable 

 to be sent out of the country. [B.] 



The paddle-fish is the spatularia of Shaw, sca^ poly don of Lace- 

 pede. It lives in the Mississippi only, and the skeleton, though 

 incomplete, is better than any other person here possesses. It is 

 carefully preserved in my collection. 



The serpent is a species of the ophalian genus anguis, the oveto 

 of the French, and the blind worm of the English. The loss of 

 the tail of this fragile creature renders an opinion a little dubious; 



