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PAL^EONTOLOGICAL BULLETIN. 

 By Edward D. Cope. 



Preliminary. 



The papers included in the following numbers, are thirteen, as follows : 



No. 1. Descriptions of some new Vertebrata from the Bridger Group of 

 the Eocene. Published July 29th, 1872 ; reprinted in the Proceedings of 

 the American Philosophical Society, early in January, 1873. 



No. 2. Second account of new Vertebrata from the Bridger Eocene. 

 Published August 3d, 1872 ; reprinted with the last. 



No. 3. Third account of the New Vertebrata from the Bridger Eocene 

 of Wyoming Territory. Published August 7th, 1872, reprinted with the 

 last. 



No. 4. On the existence of Dinosauria in the Transition Beds of Wy- 

 oming Territory. Published August 12th, 1872 ; reprinted with the last. 



No. 5. Telegram describing extinct Proboscidians from Wyoming ; 

 published August 19th, 1872 ; reprinted with the last. 



No. 6. Notices of new Vertebrata from the upper waters of Bitter Creek. 

 Published August 20th, 1872 ; reprinted with the last. 



No. 7. Second notice of Extinct Vertebrates from Bitter Creek, Wyo- 

 ming ; published August 22d, 1872 ; reprinted with the last. 



No. 8. On a new Vertebrata genus from the northern part of the Ter- 

 tiary Basin of Green Biver. Published October 12th, 1872 ; reprinted 

 with the last. 



No. 9. Descriptions of new Extinct Reptiles from the Upper Green 

 River Eocene Basin, Wyoming. Published October 12th, 1872 ; reprinted 

 with the last. 



No. 10. Remarks on the Geology of Wyoming. Published December, 

 1872, in the Proceedings of the Academy of Natural Sciences, Philadelphia, 

 for that month. 



No. 11. On two new Perissodactyles, from the Bridger Eocene. Pub- 

 lished January 31, 1873. 



No. 12. On some extinct Mammals, obtained by Hayden's Geological 

 Survey of 1872. Published March 8th 1873, not reprinted. 



No. 13. On some of Pr6f. Marsh's criticisms. Published in the Ameri- 

 can Naturalist for April 1873 ; extended. 



The preceding papers, from No. 1 to No. 9, are printed in the precise 

 form in which they originally appeared, with an exception stated below 

 including all typographical errors. This is done because the edition of 

 each as first issued was small, not exceeding 100 copies, and they will be 



