ILLUSTRATIONS 



xxi 



Plate Page 



XXXVIII. Cyclofidius simus Cope. Skull (GHT) . 387 



Cyclofidius elccedens (Cope) = "? C. simus. Maxilla (HT). 

 Cyclofidius heterodon Cope = ? C. simus. Maxilla (HT). 

 Cyclofidius incisivus Scott = ? C. simus. Palate (HT). 

 Cyclofidius [fir achy meryx) jelicefs (Cope) = C. i umus. Palate (HT). 



XXXIX. Protoreodonmedius Peterson. Skeleton (HT) 389 



Eforeodon major checki Schlaikjer. Skeleton (HT). 



XL. Merycoidodon cidhcrtsonu Leidy. Skeleton and restoration 391 



XLI. Merycoidodon gracilis (Leidy). Skeleton and restoration 393 



XLII. Eforeodon socialis Marsh. Skeleton and restoration (CT) 395 



XLIII. Eforeodon thurstoni Stock. Skeleton (HT) 397 



Phenacoccelus tyfus Peterson. Skeleton (GHT). 



XLIV. Mesoreodon mcgalodon Peterson. Skeleton (PT) .. 399 



Mesoreodon scotti Schlaikjer. Skeleton (HT). 



XLV. Promerycochcerus carnkcri Peterson. Skeleton (HT) 401 



Promerycochcerus vantasselensis Peterson. Skeleton (PLT). 



XLVI. Promerycochaerus gregoryi Loomis. Skeleton 403 



Promerycochcerus gregoryi looviisi Schlaikjer. Skeleton (HT). 



XLVII. Ticholeftus rusticus (Leidy). Skeleton (PLT) .'. 405 



Ticholef tus fetersoni Loomis. Skeleton (HT). 



XLVIII. Merychyus curtus Loomis. Skeleton (PLT) 407 



Leftauchenia decora Leidy. Skeleton. 



XLIX. Cyclofidius densus Loomis. Skeleton (HT) 409 



Cyclofidius sp. Skeletons. 



L. Eforeodon socialis Marsh. Brain cast 411 



Promerycochcerus sufcrbus (Leidy). Brain cast. 



