EXPLANATION OF PLATE XIX. 



Vertebraj oi Pijthonomorplia : of CUdantes torlor and PJalccarpas icitriciis, ono-lialf natural size. 



Fi«. 1. CVidastcs torlor, atlas centrum. 



2. Ditto, axis: a, from tlie side; 6, from liehiiid. 



3. Third cervical vertebra: a, from beliiud ; h, from before; o, from below ; (I, from (be side. 



4. Cervical more posterior: a, from below, showing free bypapopliysis attached and crushed; 



Zi, from behind. 



5. Cervical vertebra liebind tte last figured, from behind ; «, from before. 



C. rost(^rior dorsal vertebra: a, from behind ; h, from in front; c, from below. 



7. rialicarpus ic/(Tic«s, axis vertebra, from beliind. 



8. Third vertebra : a, from behind ; b, from below. 



9. A posterior cervical : a, from front ; ft, from below ; c, from behind. 



10. Last cervical : a, from front; 6, from below. 



11. Radius or fibula of a small CUilastes from Fossil Spring Canyon ; a, the inner edge of the same. 



