3 lO Bulletin American Museutn of Natural History. [Vol. XVI. 



Part of a skull, No. 1429a, is referred here; it belongs to a 

 very old individual, and the tip of the muzzle and brain-case 

 are missing. It appears to be a short-skulled species, con- 

 siderably broader but not much longer than P. intermedins; 

 the angle of the basifacial axis cannot be determined, and the 

 teeth are very much worn, so that the internal inflection of 

 the enamel has disappeared on the molars, although it persists 

 on pm^. 



Very little additional material of this species has been found 

 by our party, and none that throws any new light on the 

 younger stages of tooth-change, so that Professor Cope's pro- 

 visional reference of Tricinm paniense (juvenile P. tnrgidus) 

 cannot be confirmed. 



Palaeolagus temnodon Douglas. 



Allied to P. haydeni but probably distinct, as it comes from 

 a lower horizon and a widely separate locality. 



