586 



PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 87 



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Figure 142.— a, Triassic continents (from Arldt): The stippled areas are late Triassic, the line shading 

 indicating additional, earlier Triassic land; 6, Jurassic continents: The stippled areas are late Jurassic, 

 the line shading indicating other, early Jurassic lands. 



