LEPORIDiE— CRANIAL CUARACTEU9. 



285 



III. Postorbital process ancbylosed with the skull. Hind foot short. Pchigc 

 never white. 



A. Width of the skull half of the length. 



10. Size medium. Tail long paluslm. 



B. Width of the skull considerably lees than half the length. 



11. Size large. T-U short aquaticus. 



Tadlb lll.—SKowing tkt ratio of the width and other meaiurem(nlto/ the ikuU to the length. 



111 



*? ■■', 



