658 



TITANOTHERES OF ANCIENT WYOMING, DAKOTA, AND NEBRASKA 



is very suddenly reduced in its fore-and-aft dimension and 

 also shows the presence of the very heavy transverse process 

 and the well-expanded postzygapophysis to meet the corre- 

 spondingly broad surfa,ces of the sacrum. Unfortunately the 

 greater portion of the centrum is weathered away, but from 

 what remains it appears that it was more depressed than 



The sacrum is not represented. The oaudals appear to be 

 short and heavy and in other respects like those of the Oligooene 

 forms. 



Figure 602. — Manus of Eotitanotherium 

 osborni 



Carnegie Mus. 2860 (paratype); Uinta B 2. Ai, Supe- 

 rior view of pisiform; A2. lateral view; both one-third 

 natural size. B, Dorsal view of manus, one-sixth 

 natural size. After Peterson. 



are those in front of it. Of the first and second lum- 

 bars the centra are large, sharply keeled, and the 

 transverse processes, though generally broken off, are 

 seen to have been prominent, though attenuated. 

 There are large metapophyses, and the neural spines 

 are high and of great anteroposterior diameter. 



Measurements of Eotilanoiherium dsborni, in millimeters 



Figure 603. — Femur, tibia, and pelvis of Eotitanotherium osborni 



i, Distal end of femur, Carnegie Mus. 2860 (paratype); B, dorsal view of tibia, Carnegie 

 Mus. 2862 (paratype); C, lateral view of pelvis, Carnegie Mus. 2859 (type). After 

 Peterson. One-sixth natural size, a, Acetabulum. 



Atlas 



Greatest anteroposterior diameter 



Greatest transverse diameter 



Greatest transverse diameter of articulation for 



occipital condyle 



Vertical diameter of articulation for occipital 



condyle 



Axis 

 Greatest height 



Greatest transverse diameter 



Transverse diameter of postzygapophyses 



Length of centrum of a median cervical vertebra. 

 Depth of centrum including inferior keel, approx- 

 imately 



Seventh cervical, greatest height when vertebra 



is in position 



Seventh cervical, length of spine 



Seventh cervical, anteroposterior diameter of 



centrum 



Second dorsal, greatest height when vertebra is 



in position 



Second dorsal, length of spine 



Seventh dorsal, greatest height when in position. 



Seventh dorsal, length of spine 



Last dorsal, greatest height when in position 



Last dorsal, length of spine 



Second lumbar vertebra, greatest height when 



in position 



Second lumbar vertebra, length of spine 



Caudal belonging to middle region of tail, length. 



No. 2859 No. 2860 



90 

 250 



140 

 60 



«138 



158 



70 



95 

 250 



138 

 60 



37 



45 



195 

 120 



70 



300 

 ■325 

 200 

 165 

 165 

 90 



165 



"95 

 29 



' Approximate. 



Figure 604. — Pes of Eotitanotherium osborni 



Carnegie Mus. 2360 (paratype). Ai, Dorsal view of pes; Aj, posterior 

 view of astragalus. After Peterson. One-third natural size. 



The ribs are represented only by a few fragments, and there 

 are no sternebrae. 



The greater portion of the scapula is represented with No. 

 2859. The upper and lower ends were found separately 

 embedded in the sandstone ledge, but in working out the two 

 portions it is seen that they pertain to the same side of two 

 individuals. The bone as a whole, so far as comparison may be 



