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INTEODUCTIOK 



IX 



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Smitlisonian Institution, Washington 5 to the Academy of Natural Sciences 



of Philadelphia ; to the California Academy of Sciences ; to the Boston 



Society of Natural History ; and to Mrs. Romeo Elton of Boston, for the 



use of valuable specimens. Finally I wish to express my gratitude to Mr. 



N. S. Shaler, Director of the "Geological Survey of Kentucky, and to Mr. 



Alexander Agassiz, Curator of the Museum of Comparative Zoology, for their 



liberality in providing for the accompanying plates and map, and to the 

 former for valuable suggestions and information. I also wish to return 



thanks to Mr. Louis Trouvelot and to Mr. Paul Roetter for the careful 



manner in which they have executed the map and plates. 



An unexpected delay in the completion of the plates having occurred, 



several months have elapsed since the main part of the paper was put i 



type, which has afforded an opportunity to include in the Appendix several 



valuable communications which were received too late to be inserted in their 



proper connection. . These relate chiefly to the occurrence of the buffiilo in 



Union County, Pennsylvania, and to the date of its extirpation in the Ohio 



Valley. Matter is also added in respect to the southern limit of the buffalo 



east of the Mississippi River, especially south of the Tennessee River, which 



somewhat modify statements made respecting this point in the main body 



of the paper. Hence the attention of the reader is especially called to these 



supplemental notes. In the Appendix will also be found an important 



communication by Mr. Shaler, ^^ On the Age of the Bison in the Ohio 



Valley. 



m 



'J 



J. A. ALLEK 



Museum of Comparative Zoology, Cambridge, Mass., May 24, 1876. 



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