SG 



inner side, articulating with the radius; (2) the semilunar (inter- 

 medium), articulating with the radius ; (3) the cuneiform (ulnare), on 

 the outer side, articulating with the ulna. 

 (h) The distal row, consisting of (I) the trapezium, on the inner side 

 articulating with the scaphoid, and supporting the first metacarpal ; 

 (2) the trapezoid, articulating with the scaphoid and the centrale (see 

 c), and supporting the second metacarpal ; (3) the OS magnum, a very 

 small bone articulating with the semilunar and centrale, and support- 

 ing the third metacarpal ; (4) the unciform (fourth and fifth distal 

 carpals fused), articulating with the cuneiform, and supporting the fourth 

 and fifth metacarpals. 



(c) The central bone (centrale) between the semilunar and scaphoid, and 



appearing to belong to the distal row of carpals. 



(d) The pisiform, a sesamoid bone on the posterior surface of the wrist, 



articulating with the ulna and the cuneiform. 

 4. The hand, with five digits, each composed of a metacarpal bone and three 

 phalanges, except the thumb (poUex, which has only two), the last 

 phalanx being modified to support a claw. Note several sesamoid bones 

 developed in the tendons of the flexor muscles. 

 The pelvic girdle. 



Remove each OS innominatum from its muscular attachments and examine 



the following parts : — 

 (a) The ilium, expanded anteriorly, narrowed posteriorly, articulating with 

 the sacrum by a roughened crescentic surface on its sacral margin, and 

 forming posteriorly about half the wall of the acetabulum. 

 (&) The ischium, forming the posterior and dorsal part of the os in- 

 nominatum, having its posterior part thickened to form the ischial 

 tuberosity, and forming anteriorly about one-third of the wall of the 

 acetabulum. 

 (c) The pubes, the smallest bone of the three, meeting its fellow of the 

 opposite side in the symphysis pubis, and sending a ramus back- 

 wards to meet the ramus of the ischium, and enclose the obturator 

 foramen. 

 The hind limb. 



Remove the muscles from the hind limb and study the following parts : — 

 1. The femur, an elongated bone, forming the skeleton of the thigh ; its 

 head articulating with the acetabulum, its lower end bearing two large 

 condyles separated from each other by the intercondylar notch. Note, 

 on the outer side of the head, the large rough great trochanter ; on the 

 inner side of the bone just below the head, the lesser trochanter ; and 

 opposite to this on the outer side, the third trochanter. Examine the 

 knee-pan (patella), a large sesamoid bone sliding in the groove on the 

 lower end of the femur : and also small sesamoid bones (fabellse) at the 

 back of the knee-joint. 



