io8 



GEOLOGICAL BIOLOGY. 



Fig 31 —Vertebrate. Saurura. Archiropteryx macrura Owen. Jurassic. Restored in the 

 position of the Berlin specimen c = carpus ; c/ r:z clavicula ? ; fo = coracoid ; >4 = humerus; 

 r — radius • s = scapula ; « = ulna ; 1-lV = 1-4 fingers. (After Steinmann and Doederlein.) 



Fig. 32. — Vertebrate, Mammal. Phenacodus Wortmanni Cope. Eocene. 



