564 7 HE CORRESPONDENCE BETWEEN THE [CHAP. 



KiG. 133. Diagrammatic representation of the positions of the limbs of Mammalia. 

 '1 lie pre-axial border is left light, the post-axial border is shaded, in all the figures. 

 Limbs of the right side are represented in all cases. (A) dorsal aspect of the 

 anterior extremity in its primitive unmodified position ; gl> glenoid border of the 

 scapula; j- spine ; ch coracoid border; ssf sub-scapular fossa : //post-scapular (in- 

 fra-spinal)fo:-sa ; c coracoid ; h humerus ; gt greater, radial, or pro-axial tuberosity ; 

 // lesser, ulnar, or post-axial tuberosity ; cc external (in the modified position), 

 radial, or pre-axial condyle ; ic internal, ulnar, or post-axial condyle ; r radius ; 

 H ulna; I polkx ; v fifth digit. (H) dorsal aspect of the posierior extremity in the 

 same position; nb acctabular border of the ilium; fb pubic border; it> ischial 

 border ; gs gluteal surface ; is iliac s'irf:tce ; i ischiinn ; yJpubis ; yfemur ; // lesser, 

 tibial, or pre-axial trochanter ; / greater, fibular, or post-axial trochanter; ic in- 

 ternal (in the modified position), tibial, or pre-axial condyle : <r external, fibular, 

 or post-axial condyle ; t tibia ; f fibula ; I hallux ; v (ifih digit, (c) th- anterior 

 extremity, with the humerus in the same position, bin the elbow- and wrist-joints 

 bent. (D) the posterior extremity in the same position. 



