646 



TITANOTHERES OF ANCIENT WYOMING, DAKOTA, AND NEBRASKA 



partial and provisional restoration (fig. 579) of this \ Peterson (Carnegie Mus. Mem., vol. 9, pt. 4), is based 

 peculiar animal. This tentative restoration is un- on much better material and is doubtless more 

 doubtedly incorrect in many details, especially in the j accurate. 



Figure 578. — Skeleton of a newly born animal, provisionally identified as Metarhinus sp. 

 C.irnegie Mus. 2909; Uinta B 1; tjT)e of Beteroiiianops parvus Peterson. After Peterson. One-fourth natural size. 



Figure 579. — Provisional restoration of the skeleton of Dolichorhinus hyognathus 



One-fifteenth natural size. Based on the following specimens in the .American Museum of Natural History: 1843, Uinta B 2, 

 anterior half of skull with lower jaw, vertebral column, sacrum^ and part of pelvis; 13164, Washakie B, remaining parts of 

 skull, humerus, portions of radius and ulna, femur, Mts III, IV; 1833, Uinta B 2, scapula. The remaining parts, which 

 are more or less hypothetical, are based on Mesathhinus, with modifications supplied by fragments from Uinta B 2. The 

 number of dorsolumbar vertebrae shown in this restoration (19) is incorrect, for the last two dorsal vertebrae are omitted. 

 The complete vertebral column of Dolichorhinus longiceps in the Field Museum, Chicago, has 17 dorsals and 4 lumbars. 

 The manus as restored is too high and slender. (Compare PI. XXXII.) 



limbs, which were very incompletely known at the 

 time the restoration was made. The tibia as restored 

 is too long, the femur as preserved in No. 13164 is 

 much shorter than in D. longiceps. The restoration 

 of the skeleton of D. longiceps, figured in 1924 by 



General proportions as displayed in the composition of 

 the two principal skeletons (fig. 579). — The total length 

 of the animal with the head outstretched — that is, 

 measured from the premaxillaries to the ischium — is 

 estimated at 2.02 meters (6 feet S inches), the height 



