EXPLANATION OF PLATE XXLX. 



Vertebra; of Zio(fo« (f.i/.s/K^or, from Butto Creek, ODC-balf natural size. They are selected from various 

 points in the cohimn, the best-preserved being preferred ; most of tbe dorsal and caudal vertebraj 

 are omitted. 



Fig. 1. Atlas and axis from tbe side : a, ceutrnm of atlas ; h, nenrapojibysis ; c, bypapopbysis ; d, centrum 

 of axis, free bypapopbysis omitted {sec Plate xxviii, fig. 0). 



2. Last cervical. 



3. A posterior dorsal. 



4. A lurabo-sacral, witb its posterior face npward, witb i:pural areb on rigbt, and diapopbysis on 



left side. 

 Figs. 5 to 6. Caudal vertebriB. 



