3. 492] SOME AMERICAN CHALICOTHERES 737 



jaws (No. 1711). Tlie latter parts are here inserted (Fi(;. 21) 

 in order to give a l)elter idea of the cranium, hincc no foot hones 

 were found in connection witli these skulls, a })()sitive identification 

 of the species as clatiLs Marsh can not be made. 



The skull of J^Ioropus, as a whole, is of the lono- and narrow 

 type (Figs. 22 and 23) and is in a general wav sinnlar to tliat of 

 Macrotherium of Europe.' In this young specimen Irom Nebraska 

 there is no sagittal cuM I'he biauua^e is Mib-oxatt m toim and 

 of fairly larffc size. The pari(>tal is ])resent on one side and is ol 



