50 



THE UNIVERSITY SCIENCE BULLETIN. 



The distal end of the fifth metacarpal is broken off, as well as a 

 part of the proximal articulation. The total length of the frag- 

 ment is 82 mm. The greatest width of the proximal end is 27 mm. ; 

 of that of the lioness, 22 mm. 



The calcaneum is slightly injured at both ends. The following 

 are the measurements of this calcaneum and that of the lioness: 



Measurements of calcanea in millimeters. 



Dimensions Taken. 



Total length of bone on outer face 



Height of surface for cuboid 



Greatest height at surface for astragalus. 



Fossil 

 felid. 



123 

 31 

 50 



Felis leo. 



90 

 22 

 39 



Ratio of 



fossil 

 to Fe.lis 

 leo taken 

 as 100. 



137 

 141 

 128 



The calcaneum of another lion is 106 mm. long. 



The fourth metatarsal lacks the distal end. The greatest depth 

 of the proximal end is 25 mm.; of that of the lioness, 21.5 mm. 



The complete first phalange mentioned is 52 mm. long, meas- 

 ured on the upper surface and at the middle of the width. That 

 of the third digit of the hind foot of the lioness is 41 mm. That 

 of the fossil has the lower face flat or concave from side to side; 

 in the lioness this face is convex from side to side. 



DESCRIPTION OF PLATES. 



PLATE I. 



Figs. 1-3. Testudo eqvAcomes. Parts of plastron. Type. X 1. i, Right 

 epiplastron, seen from below. 2, Right epiplastron, showing median suture. 

 3, Left hyoplastron, seen from below. 



Figs. 4, 5. Mylodon harlani. Teeth. X 2-3. ^, Left front upper tooth, 

 seen from right, or inner, side. 5, Right first lower tooth, seen from behind. 



Figs. 6, 7. Hipparion cragini. Two views of a tooth of the right side. 

 Type. X 1. 6, Tooth seen from light, or outer, side. 7, View of the grind- 

 ing surface. 



Fig. 8. Camelops huerfanensis. Upper left milk-molar, seen from left, 

 or outer, side. X 2-3. 



PLATE II. 



Fig. 1. Equus com.plicatus. Lower left cheek-teeth, pms, pm4 and mi. 



Figs. 2-4. Equus leidyi. Upper jaw and teeth. X 2-3. 2, Left jaw 

 and four teeth, seen from below. 3, First molar, seen from left, or outer, 

 side. A, First molar, seen from in front. 



Figs. 5, 6. Camelops huerfanensis. Teeth. X 2-3. 5, Lower right 

 second molar, seen from right, or outer, side. 6, Lower right second milk- 

 molar, seen from left, or inner, side. 



