12 CONTENTS OP A BONE CAVE. 



M. 

 Diameter of base of great trochanter ..... .042 



Vertical diameter of neck ...... .023 



of head . . . .032 



Length of head and neck ...... .033 



- 031 



Diameter of shaft at middle 



(antcro-posterior . . . .023 



A proximal phalange of the inner digit of the posterior foot, or the hallux, accom- 

 panied this femur, and presents the same color. The obliquity of its proximal 

 articular cotylus demonstrates that its position in life is subhomontal. There are 

 two prominent proximal inferior tuberosities. The distal extremity is depressed, 

 so that the planes of the superior and inferior surfaces form an acute angle with eacli 

 other. In the middle of this extremity there is a rudiment of trochlcar keel. 

 The lateral ligamentous fossae are distinct but small, and are bounded by a low 

 tuberosity proximally. 



Length of phalange ....... .026 



Vertical proximal diameter I total ' 



(of cotylus . . . .008 



Transverse proxiu.al diameter . . . . . . .014 



" distal "...... .008 



This phalange I originally described as distal, an error 1 now correct. The 

 teeth which accompanied it are figured on Plate II. fig. 6. 



In a second individual the bones are earth-colored, and were not associated with 

 teeth. The middle of the shaft of the humcrus is extended in antero-postcrior 

 diameter, in consequence of the existence of an anterior median ridge. The inner 

 epicondyle is more distinctly developed than in specimens described under A. Jati- 

 dens. The crest or anterior ridge of the accompanying tibia is less prominent than 

 in those of the larger animals. The external glenoid surface overhangs very far, 

 and is supported by a lateral rib of no great prominence. The middle of the shaft 

 is strongly compressed so that the transverse diameter is small. The distal ex- 

 tremity, perhaps of the same tibia, is characterized by the great internal projection 

 of the processes, and absence of the ridges which rise from them. The tendinous 

 groove is very slightly roofed. The measurements of these bones are as follows: 



M. 



Diameter of shaft of humerus j foreandaft ' ' 023 



(transverse .... .021 



' of distal extremitv j fore and aft ' 021 



" (transverse .... .045 



of head of tibia and aft .044 



(transverse ..... .Of>2 



r i ti f i-i (fore and aft . . .025 



of shaft of tibia -{ 



(transverse . . . . . .019 



, ... . ffore and aft . . .023 



of extremity of tibia - 



(transverse . . . .034 



Transverse extent of astragalar facets ..... .028 



Associated with these fragments and having the same brown color, is a portion 

 of the hind foot, which has furnished characters for the generic description. This 

 specimen is large enough to accommodate the astragalus which accompanies the 



