75 



Sacral region. 



M. 



Length of sacral series .264 



Transverse extent of sacral series -298 



Diameter of first vertebra at free end (transverse) . 109 



Diameter of first vertebra at free end (vertical) -072 



Diameter of first vertebra at free end (fore and aft) -070 



Diameter of last vertebra at free end (transverse) -053 



Diameter of last vertebra at free end (vertical) -031 



Diameter of neural canal at first vertebra (transverse) 100 



Diameter of neural canal at last vertebra (vertical) -018 



Long diameter of first transverse foramen (internal side) -076 



Caudal region (Fig. 6, Plate VI.). 



M. 



Length of first four -252 



Diameter of centrum, first (fore and aft) -061 



Diameter of neural canal of first (transverse) -035 



Extent of transverse process in first -085 



Extent of transverse process in fourth -046 



Fore-and-aft width of transverse process of first in the middle. -048 



Ribs. Description based upon two perfect ones, and parts 

 of four more. 



The ribs, as in Dinoceras, " resemble very much those of 

 the Mastodon" The capitulum has two convex facets, sepa- 

 rated by a narrow groove. The sternal end in one is very 

 much expanded, but less so in the other. The tubercle is 

 small, and is situated upon the prolongation of the lamelli- 

 form process for the intercostal muscles. The angle is much 

 sharper than in the corresponding ribs of Mastodon. 



Measurements of Ribs. 



M. 



Length of rib without curvature 571 



Length of rib with curvature 739 



Width of rib just below head -049 



Width at muscular attachment -063 



Vertical diameter of larger facet of capitulum -039 



Scapula (Plate VIII., Fig. i). The scapula is sub-triangular, 

 with the pre-scapular border as base, and the apex half way 

 up the post-scapular. 



On the external side the pre-scapular fossa is concave an- 

 tero-posteriorly, and plane in the direction of its length ; it is 

 very thin in the middle, but becomes heavier at the lateral 



