CONTENTS 



Page. 

 BULLETIN No. 1— FIEST SERIES. 



List of members and collaborators of the Survey 3 



List of the publications of the Geological Survey of the Territories 5 



Letter of Edward D. Cope to Dr. F. V. Hayden 7 



Eeport on the stratigraphy and Pliocene vertebrate palaeontology of Northern 



Colorado, by E. D. Cope 9 



Supplementary additions to the Synopsis of New Vertebrata from the Territory of 



Colorado, 1873 22 



BULLETIN No. 2— FIRST SERIES. 



Prefatory note, by F. V. Hayden 1 



Letter of Edward D. Cope to Dr. F. V. Hayden 3 



Review of the Vertebrata of the Cretaceous period found west of the Mississippi, 



by Edward D. Cope, A. M 5 



Section I. On the mutual relations of the Cretaceous and Tertiary formations 



of the West , 5 



Section II. List of species of Vertebrata from the Cretaceous formations of 

 the West 17 



Supplementary notices of fishes from the fresh-water Tertiaries of the Rocky 



Mountains 49 



On the general characters and the relation of the flora of the Dakota group, by 



Leo Lesquereus 52 



DescriptioQS of some new Orthoptera, and notes on some species but little 



known, by Cyrus Thonias -- 63 



Notes on the Rocky Mountain ranges in Colorado Territory, by James T. Gard- 

 ner 72 



BULLETIN No. 1--SEC0ND SERIES. 



On the fishes of the Tertiary shales of the South Park, by E. D. Cope 3 



On the cranial and dental characters of Mephitinse, with description of Mephitis 



Frontata, n. s^j., Foss 7 



Ancient ruins in Southwestern Colorado, by W. H. Jackson 17 



A list of the ijhotographs illustrating the ruins in Southwestern Colorado and 



Utah 38 



Note on some fossils from near the eastern base of the Rocky Mountains, west of 

 Greeley and Evans, Colorado, and others about two hundred miles farther 

 eastward, with descriptions of a few new species, by F. B. Meek, iialajon- 

 tologist 39 



BULLETIN No. 2. 



Monograph of the genus Leucosticte, Swainson; or Gray-crowned Purple Finches, 



by Robert Ridgway 51 



Introduction 51 



History 51 



Bibliography 53 



Material examined 57 



Species and races 57 



Geographical variations 58 



Seasonal variations 59 



Individual variation 60 



Sexual differences 60 



Geographical distribution 61 



Biography ^r- , 6a 



/ 



