CLASSIFICATION OF THE HARES AND THEIR ALLIES 



By MARCUS WARD LYON, Jr. 



CONTENTS 



I. Introduction 322 



II. List of names that have been applied to the existing Hares, Rab- 

 bits, and Pikas 325 



III. List of the existing species of the DupHcidentata, arranged by 



genera and subgenera 334 



IV. General consideration of the skeleton and teeth of the DupH- 



cidentata 337 



V. Table showing principal osteological differences between the fam- 

 ilies Ochotonida: and Leporidje 384 



VI. Keys to Families, genera, and subgenera of DupHcidentata 



Based primarily on dental characters 386 



Based primarily on cranial characters 387 



Based primarily on skeletal characters other than those of the 



skull 389 



VII. Detailed account of the genera and subgenera of the existing 



Hares, Rabbits, and Pikas 389 



Family Leporidae 



Genus Lepits 389 



Subgenus Lepus 394 



Subgenus Poccilolagus 395 



Subgenus Macrofolagiis 395 



Genus Sylvilagus 396 



Subgenus Sylvilagus 401 



Subgenus Microlagus 402 



Genus Oryctolagus 402 



Genus Linuiolagiis 406 



Genus Bracliylagus 4" 



Genus Pronolagus 416 



Genus Romerolagus 420 



Genus Nesolagiis 425 



Genus Caprolagiis 426 



Genus Pentalagus 428 



Family Ochotonidae 43 1 



Genus Ochotona 43' 



Subgenus Ochotona 43^ 



Subgenus Conothoa 43^ 



Subgenus Pika 43^ 



VIII. Geographical distribution 439 



IX. Bibliography 44° 



X. Explanation of plates 443 



321 



