EVIDENCES FROM MORPHOLOGY 



^Zl 



rganism presents corresponds, in a general way, with the length of 

 me during which the divergence has been going on. Thus we 



Fig. 15. — Skeleton of Duiornis gravis, -^\ nat. size. Drawn from nature 

 British Museum). As separate cuts on a larger scale are shown, (i) the sternum 

 s this appears in mounted specimens, and (2) the same in profile, with its 

 hypothetical) scapulo-coracoid attached. {From Romanes.) 



carcely ever meet with any great departure from the typical form 



vith respect to one of the organs, without some of the other organs 



jbeing so far modified as of themselves to indicate, on the supposition 



