EXPLANATION OP PLATE 10. 



All specimens from the Middle Triassic of West lluniboldt Range, Nevada. 



Fiji. 1. CymbospondylusC 1 .) ntilnns, u. sp. Vertebrae from middle region of caudal fin. 

 no. 10624. X V--. 



Figs. 2a and 2b. Cymbospondylus /><! runts Leidy. anterior caudal centrum, no. 8120, X % 

 'la, lateral view. 2b, inferior view. 



Figs. 3-7. Cymbospondylus petrinus Leidy. Ribs, no. 9950, X % 



3. Anterior cervical rib. 



4. Posterior cervical rib. 



5. Anterior dorsal rib. 



6. Middle dorsal rib. 



7. Caudal rib. 



Fig. 8. Cymbospondylus petrinus Leidy. Abdominal ribs, no. 9154, about ^ of natural sixe. 



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