92 



MEMOITCS OF THE UNIVERSITY OP CALIFORNIA. 



Il5a 



115b 



11 6a 



1 16b 



H7a 



117b 



118 



119 



120a 



120b 



120c 



Figs. 115rt to 120r. Mixosaurm ( ?) atavm (Quenstedt). All figures natural size. Figures except- 

 ing 118 and 119 from rough sketches by the author. 



Figs. 115a and 1156. Posterior dorsal vertebra showing double rib articulation. From the col- 

 lections of the Polytechnikum, Zurich. 



Figs. 116a and 1166. Posterior dorsal showing single rib articulation. From the collections of 

 the Polytechnikum, Zurich. 



Figs. 117a and 1176. Posterior dorsal showing double rib articulation. From the collections of 

 the Polytechnikum, Zurich. 



Figs. 118 and 119. Caudal vertebrae. (After Fraas.) 



Figs. 120o to 120c. Anterior caudal vertebra showing facets for chevrons. From the collec- 

 tions of the Polytechnikum, Zurich. 



