DISPERSAL OF NORTH AMERICAN BIOTA. /I 



Hay, 0. P. 



'02 Bibliography and Catalogue of the Fossil Vertebrata of North America. 



Hull. 179, U. S. Geol. Survey. 

 Hatcher, J. B. 



'02 Discovery of a Musk Ox Skull (Ovibos cavifrons Leidy), in We>t Vir- 

 ginia, near Steubenville, Ohio. Science, N. S., Vol. XVI., pp. 707-709. 

 Meek, S. E. 



'03 Distribution of the Fresh-Water Fishes of Mexico. Amer. Nat., Vol. 



XXXVIL, pp. 771-784- 

 Nelson, Edw. W. 



'87 Report upon Natural History Collections made in Alaska between the 



years 1877 and 1881. Signal Service, U. S. Army. 

 Ortmann, A. E. 



'02 The Geographical Distribution of Freshwater Decapods and its Bearing 

 upon Ancient Geography. Proc. Amer. Philos. Soc., Vol. XLI., pp. 267- 

 400. 

 Rydberg, P. A. 



'oo Composition of the Rocky Mountain Flora. Science, N. S., XII., p. 



, 870-873. 

 Stejneger, L. 



'01 a. On the Wheatears (Saxicola) Occurring in North America. Proc. U. 



S. Nat. Mus., Vol. XXIII., pp. 473-481. 



'oi l>. The Two Races of Saxicola CEnanthe. Auk, XVIII., pp. 186-187. 

 Transeau, E N. 



'03 On the Geographic Distribution and Ecological Relations of the Bog Plant 

 Societies of Northern North America. Bot. Gaz., Vol. XXXVI., pp. 

 401-420. 



