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BULLETIN 120, UNITED STATES NATIONAL MUSEUM. 



becoming finally isolated until the middle Tertiary (fig. 237) ; 2, an 

 equatorial continent, called in this volume Equatoria (fig. 232), 

 uniting New Zealand, Australia, India, Africa, and South America. 

 The Equatorian continent was apparently in existence as early as the 



r^^F^"^ 



Upper Cambrian period. Previous to this period, during the early 

 Cambrian, there were apparently two equatorial continents — Gond- 

 wanaland on the east, and to the west South Atlantis, including 

 Africa, South America, and Madagascar. In Jurassic times the 



