G L I R E S. 



33 



"Caught on the 13th of September, in the Pacific Ocean, latitude 

 13° 58' N., longitude 161° 22' W." 



This is the description by Mr. Peale, to which we can add nothing. 

 We find no specimen in the collection of the Expedition, but from the 

 figure and description as above cited, this species does not appear to 

 intimately resemble any other. From the latitude and longitude 

 given, it appears to have been captured at sea, some degrees south of 

 the Sandwich Islands. 



3. Genus DELPHINAPTERUS, Lacepede, Hist. Nat. des. Cetacees, p. 243 (180-i). 



1. DELPHINAPTERUS PEEONii (Lacepede) . 

 DelpMnus peivnii, Lacep. Hist. Nat. Get. p. 316 (1804). 



Voy. Coquille, Zool. PI. IX, Fig. 1 ; F. Cuv. Cetac. PI. XY, Fig. 2. 



Dr. Pickering records the capture of this species on the western 

 coast of South America, in latitude 50° 35'. 



4. Order GLIRES. — The Gnawing Mammals. 



1. Family CAST0RIDJ3.— The Beavers.— The Water Rats. 

 1. Genus CASTOR, Linn. Syst. Nat. I, p. 78 (1766). 



1. Castor americanus, F. Oavier. — The American Beaver. 



Castor americanus, P. Cuv. 



Cantor fiber, Linn. Syst. Nat. I, p. 78; Harlan, Goclman et al. auct. Amer. 

 Castor fiber, americanus, Rich. Faun. Bor. Am. Mamm. p. 105. 

 Castor canadensis, Kuhl. 



Aud. and Bach. Quad. N. A. Plate XLVI, Oct. ed. I, Plate XLYI. 



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