No. 232S. PLEISTOCENE VERTEBRATES IN UNITED STATES— HAY. 141 



Family LEPORIDAE. 



SYLVILAGUS?, sp. indet. 



Of what is probably a species of Sylvilagus there are in the collec- 

 tion a left ramus of a lower jaw, with molars and part of the incisor, 

 another incisor, and a front molar (Cat. No. 9248). 



Family URSIDAE. 



URSUS AMERICANUS? Pallas. 



Of the genus Ursus there are recognized two damaged humeri, the 

 shaft of one femur, a fibula, and the third and fourth metatarsals, 

 all of which probably belonged to the same individual. The length 

 of the most nearly complete humerus is 300 mm. When compared 

 with the corresponding bones of a recent individual of U. americanus 

 no important differences are observed. However, the metatarsals are 

 relatively more slender than in recent specimens observed and are 

 not so straight. The bones are not well fossilized, and little can 

 be said regarding their geological age. They were found in the 

 cave at the end most distant from the entrance. They have the 

 catalogue number 9249. 



Family CANIDAE. 



CANIS LATRANS Say. 



Of apparently this species there are present the proximal half of 

 the right femur and the distal half of the right humerus. These 

 parts are well preserved and appear to have lost all their animal mat- 

 ter, but are not thoroughly mineralized. The two pieces may or may 

 not belong to the same individual. To these have been given the 

 catalogue number 9249. 



Between the humerus and that of a specimen (No. 1326) in the 

 United States National Museum there is observed no important dif- 

 ference. In the case of the femur the distance from the inner surface 

 of the head to the outer face of the great trochanter is 33 mm. in 

 both the fossil and a femur (No. 1326) in the existing coyote; but 

 the diameter of the shafts differ, the greatest of the shaft at the mid- 

 dle of the length being, in the existing coyote, 12 mm. ; in the fossil 

 13.6. This difference is probably due to individual variation. 



AENOCYON DIRUS? Leidy. 



Plate 5, figs. 3-4. 

 In the collection there is a radius (Cat. No. 9251) of the right side, 

 nearly complete, which belonged to a large species of wolf. It is 

 compared with that of a skeleton of Canis lupus from the north of 



