298 



BULLETIN 120, UNITED STATES NATIONAL MUSEUM. 



American lands during the Cretaceous period and the earliest Ter- 

 tiary times. During the later Cretaceous (fig. 235, A) Brazil is 

 shown connected by a mid-Pacific bridge to Australia, while Pata- 

 gonia at this time or a little later is united to Australasia by the 

 Antarctic route. 



Mid-Pacific and trans-Pacific land areas are sketched into some of 

 the Cretaceous and early Tertiary maps, following in general the pres- 

 ent ocean shallows. Doubtless different Pacific ocean lands were con- 

 nected in different ways during different parts of these periods, and 



