696 



TITANOTHERES OF ANCIENT WYOMING, DAKOTA, AND NEBRASKA 



Figure 636. — Tibiae of Brontops 

 robust us and Brontotherium 



Figure 634. — Pelvis of Brontotherium gigas hatcheri 

 Nat. Mus. 42C2. Associated with skull and limbs. After Marsh. About one-eleventh natural size 



A, Brontops robustits, Yale Mus. 12048 

 (type); B, BTontothenum leidyi, Carnegie 

 Mus. 93. One-eighth natural size. 



Figure 637. — Tibia and fibula of 

 Brontotherium leidyi 



A, Carnegie Mus. 93, outer side view or 

 right tibia. B, Carnegie Mus. 114, inner 

 side view of left fibula. One-eighth nat- 

 ural size. 



Figure 635. — Femora of Brontops robuslus 

 and Brontotherium leidyi 



A, Brontops robuslus, Yale Mus. 12048 (type); B, Bronto- 

 iherium leidyi, Carnegie Mus. 93. One-eighth natural 

 size. The Brontotherium femur appears to be wider in 

 proportion to its length. 



Figure 638. — Femora of Megaceropsf and Brontotherium? 



A, Megaceropsf acerf, Am. Mus. 6351. B, Brontotherium? sp.. Am. Mus. 6347. Prosimal view. 

 One-fourth natural size. 



