324 LEADING AMERICAN MEN OF SCIENCE 



Twelve days later on September 27, writing from Camp Galli- 

 nas he says: 



"I have over 75 species of Vertebrate fossils, many new. . . . 

 The most remarkable are toxodonts of four species and two new 

 genera, which I call Calamodon and Ectoganus, varying from the 

 size of a sheep to that of a cow. The order has never been found 

 out of South America before, and is in structure between rats and 

 hoofed animals, especially elephants." 



While on October n, from "Camp N. W. from Nacimiento, 

 New Mexico," he writes: 



"I have now some 90 species of vertebrates from this bed, six 

 of them toxodonts. I have also discovered the deposits of another 

 fresh water lake of much greater age, say lower Cretaceous, not 

 many miles from here, which contains remains of saurians, one 

 like Laelaps; I have a tooth and a vertebra." fc 



The results of his summer's work in New Mexico were published 

 in several preliminary bulletins and then finally collected to form 

 a part of the volume on Paleontology which was published in 1877 

 as the fourth in the quarto series of the reports of the U. S. Geo- 

 graphical Surveys west of the One Hundredth Meridian, under 

 Lieutenant George M. Wheeler. It bears the subtitle of The 

 Extinct Vertebrata Obtained in New Mexico by Parties of the 

 Expedition of 1874. 



Cope describes his work as follows: 



"Of stratigraphical results, I may mention three: first, the 

 elucidation of the structure of the western slope of the Rocky 

 Mountains and the plateau to the westward of them, in north 

 western New Mexico; secondly, the determination of the fresh 

 water character of the Triassic -beds in that region; thirdly, the 

 discovery of extensive deposits of the Lower Eocene, equivalent 

 to the Suessonien of western Europe." 



The paleontological results were more numerous, and Cope 

 refers to them in his letter of transmission as follows: 



"They are included in the determination of the faunae of four 

 periods in basins which had not previously been explored, viz., 



