Cenozoic Floras Around the Northern Pacific 85 



"^ Mason, Herbert L. 



1934. Pleistocene flora of Tomales Formation, Carnegie Inst. Wash. Pub. 415, 



pp. 81-179- 



^ Mason, Herbert L., ibid. 



'* Frick, Childs 



1930. Alaska's frozen fauna, Natural History, 30, pp. 71-80. 



" Chaney, Ralph W. 



1927. Hackberry seeds from the Pleistocene loess of northern China, Am. 

 Mus. Novitates, no. 283, pp. 1-2. 

 *^ Chaney, Ralph W., and Daugherty, Lyman H. 



1933. The occurrence of Cercis associated with the remains of Sinanthropus, 

 Geol. Soc. China Bull., 12, pp. 323-326. 



