XIX. 



CARNIVORA. 



347 



rosity being almost obsolete. The two lateral digits (first 

 and fifth) are both longer and much stouter than the others ; 

 the middle digit is the shortest. In the Elephant Seal 

 (Macrorhinus leoninus\ all the phalanges (except the 

 terminal ones) have epiphyses at both ends of the shaft 

 (see Fig. 124). 



r 1 



FIG. 12 j. Dorsal surface of right pes of young Elephant Seal {MacrorJiinus 

 leoninus), \, showing the epiphyses. The letters as before. 



In the OtariidcB, or Eared Seals, and the Walrus, which 

 use the hind feet in walking, these modifications from the 

 ordinary type are not so marked, the calcaneum having a 

 greater backward projection, and all the digits being of 

 nearly equal length. In both there is a large sesamoid on 

 the tibial side of the tarsus. 



In 



the greater number of the animals of the order 



