No. 2328. PLEISTOCENE VERTEBRATES IN UNITED STATES— HAY. 93 



to have incisors not perceptibly different from those from Whites- 

 burg. 



TAMIAS STRIATUS (Linnaeus). 



Of this species there is present only a single tooth, a lower right 

 incisor (Cat. No. 8961). On comparison with the corresponding 

 tooth of a recent specimen it appears to be slightly larger. 



MARMOTA MONAX (Linnaeus). 



Of this species there have been preserved an upper left incisor 

 (Cat. No. 8962) complete; the distal half of the lower left incisor 

 (Cat. No. 8963); the left humerus (Cat. No. 8964), lacking the 

 head ; and the left femur (Cat. No. 8965) , lacking the distal end. No 

 important differences are observed on comparison with the cor- 

 responding parts of a recent skeleton. 



Family CASTORIDAE. 



CASTOR CANADENSIS Knhl. 



This species is represented by 10 grinding teeth (Cat. No. 8966) 

 and a fragment of the right ramus of a lower jaw (Cat. No. 8967). 

 These parts are not distinguishable from the corresponding ones of 

 the existing beaver. 



Family CRICETIDAE. 



NEOTOMA PENNSYLVANICA Stone. 



Of the Pennsylvania wood rat there are present six lower incisors, 

 one upper incisor, and a lower first molar. To these have been given 

 the catalogue number 8968. Some of the incisors are slender, but 

 Dr. E. A. Goldman, who has given especial attention to the species of 

 this genus \ gives the assurance that all of the teeth belong to N. 

 pennsylvanica. The writer is of the opinion that this species may 

 prove to be identical with Baird's N. magister. 



MICROTUS PENNSYLVANICUS (Ord). 



A lower left incisor and a lower left first molar (Cat. No. 8969) 

 belonging to this collection are referred to this species. The incisor 

 is rather slender, but it may have belonged to a young individual. 



Family LEPORIDAE. 



LEPUS AMERICANUS Erxleben. 



In the Whitesburg collection are six lower jaws or parts thereof 

 (Cat. Nos. 8970-8975), five of them with teeth; two fragments of left 

 maxillae with teeth, and one of the left side without (Cat. Nos. 8976- 

 8978) ; a premaxilla with an incisor (Cat. No. 8979) ; 12 vertebrae, 



1 North American Fauna, No. 31. 



