EDWARD DRINKER COPE 329 



herbivorous Dinosaurs of the Dakota (1877 and 1878) and the 

 horned Dinosaurs (Monoclonius) of the Laramie formations; 

 fourth, the numerous papers based upon the Reptilia of the Trias- 

 sic, especially the Permian. The latter must be considered the 

 most important and unique in their influence upon paleontology." 

 They have also been described as his "most epoch-making contri- 

 butions." Many of his papers on the reptiles were contributed to 

 the Proceedings of the American Philosophical Society. Mention 

 was made in the preceding paragraph of his two important works 

 on batrachia and reptilia in the publications of the U. S. National 

 Museum. To them may properly be added his "Catalogue of 

 Batrachia and Reptilia of Central America and Mexico" (1887) 

 also published by the National Museum. In it 197 genera are 

 represented. These include 705 species which are divided be- 

 tween 135 Batrachia and 570 Reptilia. His last large work, com- 

 pleted a few months before his death, was on "The Crocodilians, 

 Lizards, and Snakes of North America." It formed a monograph 

 of 1095 pages with 36 plates and 347 text figures, and was issued 

 as an appendix to the Report of the U. S. National Museum for 

 the year 1898. According to Cope this work, together "with my 

 book on the Batrachia published in 1889, and Doctor's Baur's 

 on the Testudinata (in preparation), 1 the access to North American 

 herpetology becomes equal to that which the science of ornithology 

 has long enjoyed." This work gives descriptions in full of all the 

 species and their including categories. The classification which 

 he had already elaborated in various memoirs is adopted, and as 

 in the "Batrachia," the genera and their including groups of the 

 entire world are diagnosed in analytical tables, but full descriptions 

 are given only of the North American types. 



Professor Cope's most numerous and voluminous papers were 

 devoted to mammals and more especially to fossil mammals. His 

 conspicuous contributions in this domain are by common consent 

 conceded to be those which have led to the development 

 and establishment of certain fundamental principles which he 



1 The untimely death of Doctor Baur unfortunately prevented the publica- 

 tion of his work. 



