CONTENTS. 



Description of the vertcbratc-bcaring beds of North-central New Mexico. .S. W. Wilhston and E. C. 



Case I 



Description of Aspidosaurus novomexicanus WiUiston. E. C. Case and S. W. Williston 7 



Description of Chenoprosopus milleri gen. et sp. nov. M. G. Mehl 11 



Description of a nearly complete skeleton of Diasparactus zenos Case. E. C. Case and S. W. Williston 17 



Description of a nearly complete skeleton of Ophiacodon Marsh. S. W. Williston and E. C. Case. ... 37 



Description of Scoliomus puercensis, new genus and species. S. W. Williston and E. C. Case 60 



Description of certain collections of lx)nes referred to Sphenacodon Marsh. E. C. Case and S. W. 



Williston 61 



Description of Edapkosaurus Cope. S. W. Williston and E. C. Case 71 



Edaphosaurus notomtxicanus, sp. nov. S. W. Williston and E. C. Case . 74 



iv 



