ON THE MORPHOLOGICAL CONSTITUTION OF LIMBS. 203 



prolonged downwards, towards the haemal margin of the body ; 

 that the scapula is a proximal segment, elongated towards the 

 neural margin of the body ; that the clavicle is the only other 

 retained segment in the same transverse row as the coracoid, 

 in front of it, and elongated like it in the haemal direction ; 

 and that the corresponding elements of the posterior limb 

 have a similar morphological signification. 



