LEPUS CUNICULUS 



287 



on beyond the joint as a laterally compressed olecranon process. 

 The carpus or wrist consists of nine bones. The three proximal 

 carpalia, i.e. the radiale, intermedium and ulnare, are three small 

 bones articulating with the radius and ulna and sometimes termed 

 the navicular (scaphoid) , lunate (semilunar) and triquetral (cuneiform) 

 respectively. The distal carpalia in 

 order from the radial to the ulnar side 

 are the greater multangular (trapezium), 

 the lesser multangular (trapezoid), the 

 capitate (os magnum), and the hamate 

 (cuneiform) ; the last named represent- 

 ing the fusion of two separate elements. 

 Between the proximal and distal car- 

 palia lies another small bone, the 

 centrale, and on the under side of the 

 carpus articulating with the ulna and 

 navicular is a small pisiform bone usually 

 regarded as being a sesamoid bone. 

 There are five metacarpals, of which 

 the first is markedly smaller than the 

 rest. The digits are also five in number, 

 of which the innermost, the thumb or 

 pollex, is much shorter than the others, 

 possessing only two phalanges as against 

 three in the remainder. (7 B * IV 



Hind Limb. ll III 



The hind limb is noticeably FlG 94 ._Left forefoot of 

 larger than the fore limb and plays a Lepus viewed from extensor 

 far more important part in locomotion. 

 The femur is a long bone with a 



un. 



surface. 



C., capitate ; Ce., centrale ; H., 

 hamate ; I., intermedium ; M., great 



- hamate; I., intermedium ; M., great 



Cylindrical Shaft and tWO enlarged ex- multangular; ., lesser multangular; 

 J . . metacaral P. halanx R. 



., 



M.C., metacarpal ; P., phalanx ; R., 

 radiale, navicular; Ra., radius; 



. . , f , , 



tremitieS. On the inner Side OI trie radiae, navcuar; a., raus; 

 -, i , RE. epiphysis of radius ; U., ulnare, 



proximal end is a large projecting triquetrai ; U.E., epiphysis of ulna ; 

 rounded head which lies partly en- ^^.; u %:; <Sl? pb * 

 closed within the acetabular cavity. 



On the outer side of the proximal end, opposite the femur, is 

 a large rough mass, the great trochanter, and between that and 

 the head on the hinder side is a deep trochanteric fossa. Just 

 below the head are two smaller projections, one on each side ; 

 that on the inside being the lesser trochanter and that on the outside 

 the third trochanter. The distal end of the bone is swollen out to 

 form two large condyles separated by an intercondylar notch ; it 

 articulates with the tibia and fibula. Over, the front of this joint 



