No. 2328. PLEISTOCENE VERTEBRATES IN UNITED STATES— HAY. 143 



dyle is 70 mm. ; that of the fossil femur, 57 mm. In this respect the 

 femur resembles that of a bear, but it is otherwise quite different. 



The tibia has lost the external part of the articular surface for 

 the astragulus. The total length is 283 mm. The lower half of the 

 shaft is nearly terete, not triangular in section as in the lion. The 

 front border is considerably concave from one end to the other, as 

 in the lion. In the bear this border is straight. The second meta- 

 carpal is 102 mm. long, 23 mm. wide, and 25 mm. deep, proximally. 

 The bone is straight, as in the bear, not curved as in the lion and 

 tiger. It is, however, too large to be the metacarpal of any bear of 

 ordinary size. There are present two second phalangeals that are 

 referred to as the same sabertooth. There is preserved also an ungual 

 phalangeal (pi. 5, figs. 1, 2) which resembles much that of a lion. 

 It is, however, thicker from side to side. There seem likeAvise to 

 have been no lamellae of bone to cover the base of the horny claw. 



FELIS?, sp. indet. 



In the collection there is a single lumbar vertebra, probably the 

 fourth, which belonged to some felid much smaller than the one here 

 described as Dinobastis sci'-us. The length of the centrum is only 

 34 mm. The width and height of its hinder end are, respectively, 

 32 mm. and 19 mm. The outer faces of the neural arches are more 

 nearly perpendicular than in the lumbar of the supposed Dinobastis. 

 This vertebra can not belong to Felis couguar^ for the lumbars of 

 this are at once longer and narrower and have the zygapophyses 

 more widely separated. 



EXPLANATION OF PLATES. 

 Plate 3. 



Figs. 1-3. — Testudo inunda. X 1. Type. 



1. Left second peripheral. 



2. Right seventh peripheral. 



3. Fragments of the plastron showing hypoplastrals and xiphiplastrals. 

 Figs. 4-11. — Tapiriis tennesseae. Upper and lower teeth. X 1. Type. 



4. Upper right third premolar. 



5. Upper right second molar. 

 G. Lower left second premolar. 



7. Lower right third premolar. 



8. Lower right fourth premolar. 



9. Lower right second molar. 



10. Lower left third molar. 



11. Lower incisor. 



Figs. 12-13. — Myloliyus nasutiis. X 1. 



12. Upper left canine ; inner face. 



13. Upper right canine ; inner face. 



Figs. 14r-l^.—Sangamona fugitiva. Second molar. X 1. Type. 



14. View of grinding surface. 



15. View of outer face. 



