CONTENTS OF A BONE CAVE. 25 



M. 



Length of cannon bone ....... .065 



Transverse diameter proximally ..... .016 



" " medially. ..... .009 



" " distally . . . . . . .019 



Length of isehium ....... .047 



Width medially . . . . . . . .010 



Length of pubis to symphysis ..... .012 



Greatest diameter of symphysis ..... .007 



Several bones of a second individual accompanied those above described, which 

 are of larger size and present adult characters. They include mutilated scapula and 

 humerus, a nearly perfect ulno-radius, a metacarpal cannon bone, and a phalange. 



As compared with those of a rather small Ovis aries, these bones are smaller, 

 and present the following differences : The glenoid cavity of the scapula presents a 

 straighter or less convex internal border. The coracoid process is a little longer ; 

 the base of the spine is nearer the anterior edge. The form of the humeral shaft 

 is similar, but the internal peduncle of the condyles has greater anteroposterior 

 width. The extremities of the bone are lost. The radius scarcely differs from 

 that of the sheep. I notice a little greater depression of the external part of the 

 head, and a rather longer proximal interosseous foramen ; the fossa behind the 

 scaphoid facet is deeper. The proximal end of the metacarpal cannon bone has 

 the same form as that of the sheep, but differs in the larger size of the facet for 

 the os tmpeziomafjnum, which is also without the large interior emargination seen 

 in the sheep. Distally the fossa? at the anterior bases of the condyles are less pro- 

 nounced, and the external trochlea? of both condyles are less produced outward. 

 In accordance with this form the proximal phalange is a little narrower proximally 

 than in either foot of the sheep; the shaft is also narrower than that of the sheep's 

 fore foot, while the entire bone is longer than that bone, or the corresponding pos- 

 terior phalange of the sheep. The ligamentous fossae are bounded by much more 

 prominent and rugose ridges of insertion. The inferior tendinous insertions are 

 about as in the sheep. 



MEASUREMENTS. 



M. 



Diameter of middle of shaft of humerus j anteroposterior . . .018 



(transverse . . .015 



Width of neck of scapula . . . . . . .0175 



Length of radius ....... .038 



Proximal diameter of radius j vertical (greatest) - 013 



(transverse . . . . .027 



Distal diameter of radius l vertical < of facets ) ' - 013 



(transverse .... .023 



Length of anterior cannon bones ..... .097 



Diameter of proximal end of cannon bone | transvel<sc 



(fore and aft (internally) .014 



Length of external proximal phalange .... .037 



Diameter ' proximallr j vert!cal ' 15 



(transverse . .011 



| vertical (chord) . .011 

 (transverse (least) . .007 

 Discovered by Dr. Rijgersma with the bones of Amblyrhiza, etc. 



4 April, 18S3. 



