EXPLANATION OF PLATE 8. 



Shastasaurus osmonti n. sp. 



All figures are from the type specimen, and are represented three -fourths 



natural size. 



Fig. 1. — Cervical centra showing well developed di- and parapopliyses and 

 facets for reception of intercentra. First three vertebrae in 

 this series. 



Fig. 2. — Cross-section of 3rd cervical centrum of this series. The position 

 of the base of this centrum behind the inferior apophysis is 

 shown by a dotted line. 



Fig. 3. — Anterior dorsal centrum showing greatly reduced parapophysis ; 

 11th vertebra of this series. 



Fig. 4. — Cross-section of 11th vertebra of this series. 



Fig. 5. — Posterior or middle dorsal centrum, 35th of this series. 



Fig. (3. — Cross-section of 35th centrum of this series. 



