EXPLANATION OF PLATE 12. 



Shastasaurus alexandrse n. sp. 



The type specimen, represented two-ninths natural size. 



Excepting the right seapula and the left humurus, the bones have not 

 been moved from the positions which they occupied in the matrix. The 

 right scapula was doubled underneath the coraeoid and the humerus frag- 

 ment partly covered the left coraeoid. The right scapula and coraeoid were 

 cut by a somewhat irregular vein of calcite. 



Co, left coraeoid. 

 So, left scapula. 

 CI, left clavicle. 

 H, left humerus. 

 D, dentary. 

 A, angular. 

 8:i, supra -angular. 



Sp, splenial. 



Mx, 



L, 



J, 



N, 



F, 



maxillary, 

 lachrymal . 

 jugal. 

 nasal, 

 frontal . 



Ptf, postfrontal. 

 Pa, parietal 

 8t, supratemporal . 

 Sq, squamosal. 

 Po, postorbital. 

 Sel, sclerotic plates. 



Pr, prefrontal. 



