LOXOLOPHODON AND UINTATHERIUM. 



39 



crossing of the shafts is less marked than mElephas. The distal end of the shaft 

 is perhaps slightly larger than the proximal ; it has a sub-trihedral face for the 

 scaphoid and lunar bones, with a narrow facet for the ulna. 



The Ulna, with a massive olecranon process above, has a stout shaft arching 

 slightly forwards and terminating below in an oblong facet which articulates 

 with the cuneiform, and has a small facet for the lunar. The diameter of the 

 shaft is about one and a half times that of the radius. The latter is evidently 

 in process of reduction, as the weight of the shoulders falls more and more upon 

 the ulna. Still the disproportion in size is not strongly marked. The distal faces 

 of the ulna and radius are sub-equal in size. 



Of the bones of the Manus the Museum contains the proximal 

 row of the carpus, two of the distal row, and several of the metacarpals. 

 The proximal row, and consequently the entire foot, is directed somewhat 

 outwards, owing to the oblique position of the distal faces of the ulna and 

 radius. The scapJwid is long, with a much-rounded proximal face. The lunar 

 has a narrow face for the ulna ; it is of an irregular quadrilateral shape ; with the 

 cuneiform it covers the entire lower articular face of the radius. On their lower 

 side both these bones meet the unciform. The median metacarpal. III., is 

 placed between the magnum and unciform. Metacarpals IV. and V. articulate 

 with the unciform. Each toe is furnished with a complete number of phalanges, 

 which, according to Marsh, are short and proboscidian in appearance. 



Hind Limb. 



The Femur has a small rounded head, with no pit for the ligamentum teres, 

 placed partially out of the line of the shaft. The great trochanter is much 

 thickened fore-and-aft and slightly recurved behind. Below it the shaft narrows 

 to the centre, and then widens rapidly into the broad condylar extremity. The 

 lesser trochanter is a strongly rugose line. There is no third trochanter. The 

 condyles are of nearly equal size, very convex, and divided by a deep popliteal 

 groove. The condylar tuberosities are narrow ; each sends a ridge obliquely 

 inwards above the popliteal space for attachment of the great adductor muscle 

 on the internal side and for the heads of the gastrocnemius muscles on either 

 side. The trochlear face for the patella is short. 



The Tibia is short and stout, contracted at the middle, expanded and very 

 rugose at the extremities. The massive proximal end supports deeply concave 

 articular faces separated by a slight ridge ; of these the inner is considerably 

 higher, as in the mastodon. The tuberosity is cupped above for the reception of 

 the ligament of the patella. The popliteal space is shallow ; just on its outer 

 margin is the small facet for the fibula. The Fibula is a very slender bone placed 



