THE OPALINID CILIATE INFUSORIANS. 



299 



the patterns of the interruptions of these connections in the different 

 maps are not significant. 



Arldt does not show Antarctic connections with Patagonia, New 

 Zealand, or Australia. Our maps show such connection during the 



later Cretaceous and earlj^ Tertiary. An Antarctic route from Pata- 

 gonia to Australasia seems altogether probable on into Miocene times, 

 at a time when Antarctic fossils show a mild and moist climate. The 

 later Cretaceous may have shown similar connection. Trans-Pacific 



