422 



MEMOIRS OF THE CARNEGIE MUSEUM. 



Measurements of D. annectens. 



Type, Y.M. 



No. lOtlOl. 



Neotype, 



Y. M. 

 No. 1UU04. 



Neotvpe, 



A. M. 

 No. 7324. 



Length of skull from inion to broken points of nasals 



Occipital condyles to and including P' 



Occipital condyle.s to M^ 



Greatest transverse diameter of skull at posterior angle of zygomatic 



arches 



Transverse diameter of occipital plate. (Measurement taken 



superiorly) 



Antero-posterior diameter of P', - and ^ 



Length of upper dentition 



Length of premolars 



Length of molars .' 



Antero-posterior diameter of P' 



Transverse 



Antero-posterior 



Transverse 



Antero-posterior 



Transverse 



Antero-posterior 



Transverse 



Antero-posterior 



Transverse 



Antero-posterior 



Transverse 



Antero-posterior 



Transverse 



Length from Pi to and including the lateral incisor . . 



Length of P2 and P3 



Length of Pj 



Length of P3 



Antero-posterior diameter of crown of median incisor. 

 Transverse diameter of same 



P'.. 



P2.. 

 P=.. 

 P'.. 

 P^. 

 P^. 

 P^. 



Ml. 

 M'. 



M\ 

 M-. 

 M'. 

 M^ 



95 mm. 



21 mm. 

 17 mm. 

 23 mm. 

 27 mm. 

 27 mm. 

 34 mm. 

 29 mm. 

 38 mm. 



*19 mm. 

 *1S mm. 

 *23 mm. 

 *28 mm. 



110 mm. 

 48 mm. 

 23 mm. 

 26 mm. 



8 mm. 

 6 mm. 



410 mm. 



368 mm. 

 185 mm. 



235 mm. 



83 mm. 



63 mm. 

 185 mm. 



93 mm. 



98 mm. 



19 mm. 



17 mm. 



24 mm. 

 *28 mm. 



28 mm. 



35 mm. 



30 mm. 



39 mm. 

 35 mm. 

 41 mm. 



40 mm. 



41 mm. 

 33 mm. 

 38 mm. 



* Approximate measurements. 



compared with the John Day species, D. annectens. Paroccipital and postglenoid 



processes in close proximity to one another as in D. niobrarense. Border of anterior 



nares extending further back than in the latter species. Animal considerably larger 



than the tapir. 



General Description. 



The type specimen was discovered by Dr. W. K. Gregory of the American Mu- 

 seum party of 1906. The skull is somewhat depressed by crushing, which fact 

 has been taken into due consideration. That the cranium may i)robably be that 

 of a female should also be noted. The animal was of advanced age, as the den- 

 tition is greatly worn down and of no practical service for specific determination. 



There is no true contact between the broken end of the prema.xillary and the 

 maxillary bone in the type at present, but Dr. W. D. Matthew assured me that it 

 was complete when discovered, and that the length of the premaxilla is not far 

 from correct as restored. (See PI. TJX). Whether or not there was a lateral 

 incisor, as in Coenopus tridactylus from the Protoceras beds, cannot positively be 



