100 



1870. Gray. Supplentont to the Catalogue of Shield Reptiles in the 



Britiflli Miiseuin. London. 



1872. Uuxley. Anatomy of the Vertebrata. London. 



B — Works treating of the (jeographical <li»tribution of North American 



Batrachia and licptilia. 



1857. Apissiz. Contribntions to the Natnral History of the United 

 otates, vol. i, i)art i, p. 449. On the Geographiejil Distribntion 

 of North American Testndinata. 



1866. Baird. The Diatribution and Migration of North American Birds. 

 American Jonrnal of the Sciences and Arts, p. 78, 184-347 (Jan 

 uary). 



1866. Verrill. Jtepoit of some Investigations upon the Geographical 

 Distribution of North American Birds. Proceedings of the Bos- 

 ton Society of Natural History, vol. x, p. 259 (May). 



1866. Oope. On the Reptilia and Batrachia of the Sonorau l^rovincc 

 of the Nearctic Region. Proceedings of the Philadelphia Acad- 

 emy, p. 300 (October). 



1869. Cope. On the Origin of Genera. Philadelphia. 



1871. Allen, J. A. Bulletin of the Museum of Comparative Zoology. 



vol. ii. No. 3, p. 404. 



1873. Cope. Gray's Atlas of the United States, p. 32. Geographical 



Distribution of North American Vertebrata (with map). 



