43 



Fig. 2, Plate XIX, represents a much better preserved distal extremity of 

 the femur than that of the former. It was obtained by Professor Hayden's 

 party at Grizzly Buttes. At the supra-condyloid eminences it is 3^ inches 

 in diameter. The width at the condyles is 2f inches. The trochlea for the 

 patella, where widest, measures 16 lines. 



The detached head of a femur, in perfect condition, found by Dr. Carter 

 near Fort Bridger, measures about 2 inches in diameter. A deep cup-like 

 pit for the round ligament approaches the center of the head much more 

 closely than in the tapir. 



A nearly entire femur of Palseosyops, received from Dr. Carter since the 

 above was written, is represented in Fig. 5, Plate XXIX. It nearly repeats 

 the form of that of the tapir, but rather resembles that of the Indian tapir, 

 or Baird's tapir, of Guatemala, than that of the American tapir. In compari- 

 son with that of the Tapirus Bairdi, it is rather larger, and the upper 

 extremity is proportionately somewhat wider. The inner trochanter is 

 longer or more prominent, but the third trochanter is neither so long nor so 

 hook-like. 



The measurements of the specimen are as follows : 



Inches. 



Length externally from summit of great trochanter 15 J 



Width between head and great trochanter 4£ 



Width at third trochanter 2f 



Diameter of head 2i 



o 



Diameter fore and aft of shaft at middle 1£ 



Width at condyles 3J 



Fig. 1, Plate XX, represents a nearly entire tibia, obtained by Professor 

 Hayden's party at Grizzly Buttes. The upper condyles arc in some degree 

 pressed toward each other, and the extremity of the internal malleolus is 

 broken off. The bone is not quite so long as that of a tapir with which it 

 was compared, but is somewhat stouter. The tuberosity for the ligament of 

 the patella is of more robust proportions, and extends lower on the shaft than 

 in the tapir. The ridge descending from it is thicker than in the latter — 

 straighter, and is obtusely rounded. The length of the tibia is 9 inches ; the 

 breadth of its distal end over 2 inches. 



Fig. 2, Plate XX, represents a calcaneum, obtained by Dr. Corson near 

 the stage-route at the crossing of Smith's Fork of Green River. It is nearly 

 like that of the tapir, but is stouter in proportion to its length. The tuber- 

 osity of the calcaneum is less compressed and is more obtuse in front. The 



