74 



Caudal region (Plate VI., Fig. 6). (Description based upon 

 the first four.) 



The centra of the caudal vertebras are rather long, narrow, 

 and greatly depressed in the middle ; they decrease in size 

 gradually backward. The pedicles and laminae are short and 

 thin, enclosing a small neural canal. The neural spines point 

 directly back, being almost parallel with the axis of the cen- 

 trum. They are slender and tuberous at the extremity. The 

 transverse processes are very long, wide, and thin, thickened 

 somewhat at the ends, and project directly out ; they decrease 

 in size backwards. From the persistence of the neural canal, 

 and from its comparative size, it would seem as if the tail 

 was considerably larger than that of the elephant. 



Measurements of Vertebrce. 



Cervical region (Plate VI., Fig. n). 



M. 



Diameter of cervical (vertical) -079 



Diameter of cervical (transverse) -in 



Diameter of cervical (fore and aft) -051 



Extreme length of prolongation of pedicles for zygapophyses -089 



Long diameter of vertebraterial canal -040 



Width of pedicles -035 



Dorsal region (Plate VI., Figs. 2 and 3). 



M. 



In anterior region : Diameter of centrum (fore and aft) -075 



Diameter of centrum (vertical) . 062 



Diameter of centrum (transverse) -142 



In posterior region (Plate VI., Fig. 3). : Diameter of last dorsal (vertical) -087 



Diameter of last dorsal (transverse) -no 



Average width throughout the series of neural canal -097 



Width of transverse process (anterior dorsal) (Fig. 2, Plate VI.) -075 



Length of lamina from prezygs. to post-prezygs. (Fig. 2, Plate VI.). ... -12 



Length of transverse process (middle dorsal), (Fig. 3, Plate VI.) -055 



Vertical length of anterior dorsal from tip of spine to hypapophysial keel 183 



Width between inner margins of metapophyses (last dorsal) -172 



Lumbar region Last lumbar (Plate VI., Figs. 4 and 5). 



M. 



Diameter of centrum (fore and aft) -095 



Diameter of posterior face (transverse) -in 



Diameter of posterior face (vertical) -078 



Extreme width between transverse processes -214 



Width between pre-zygapophyses -no 



Length of neural spine from lamina -060 



Vertical length from tip of spine to lower side of centrum -194 



