CHORD ATA — VERTEBRATA 



327 



The fore limb, attached to the backbone by muscles only, 

 is composed of a shoulder-blade (scapula), collar-bone (clav- 



scaph.l. 



Fig. 141. — A, bones of the x\gh.t Jore foot of the cat ; dorsal view, ca., carpus (or 

 wrist); cjt., cuneiform ; wg., magnum ; wc. and w.ca., metacarpal (palm) bones; 

 p., phalanges (or bones of the toes); pi., pisiform; scaph.l., scapholunar; trd., 

 trapezoid ; trm., trapezium ; un., unciform ; /, //, etc., digits, ist (thumb), 2d, etc. 

 B, bones of the right hind foot of the cat ; dorsal view, a., hood to inclose root cf 

 claw; as., astragalus; b., process to sustain the claw; cal., calcaneum; cu.^, cu.^, 

 cu.^, internal, middle and external cuneiform respectively; aib., cuboides; mt. 

 and m.ta., metatarsals; nav., navicular; p., phalanges; ta., tarsus (or ankle); 

 /, //, etc., digits, ist (represented only by a degenerate metatarsal), 2d, etc. (Re- 

 drawn from Mivart.) 



icle), arm-bone (humerus), bones of forearm (radius and 

 ulna), seven wrist bones (carpals) arranged in two rows, five 

 palm bones (metacarpals) and fourteen finger bones (phalanges) 



