Holland: Crocodile From Montana. 



287 



Dimensions. 

 ( First left dorsal rib. See Fig. 6. ) 



Greatest length from end of tuberculum to distal extremity 460 mm. 



Distance from outer edge of tuberculum to extremity of capitulum... 220 " 



Greatest width of rib over tuberosity 80 " 



Greatest width of capitulum at end 60 " 



Anteroposterior diameter of capitulum at end 32 " 



Greatest width of tuberculum at end 50 " 



Antero-posterior diameter of tuberculum 30 " 



Greatest width of distal end of rib 60 " 



Antero-posterior diameter of rib at end 35 " 



The Pubis. 

 (C. M. Cat. Vert. Foss., No. - 9 /t .) 



A very well preserved specimen of the right pubic bone was re- 

 covered. It agrees very closely in its general outline and proportions 

 with the corresponding bone in recent crocodiles, but is somewhat less 

 rounded on its distal margin and decidedly less excavated on its pos- 



Fig. 7. Right pubis of D. hatcheri. About \ nat. size. Figure on the left upper 

 surface ; on the right lower surface. 



terior margin, at least when compared with the specimens of Crocodi- 

 lus and Alligator before me. It is represented in Fig. 7, the illustra- 

 tion at the left of the cut showing the superior, and that on the right 

 of the cut the inferior surfaces of the bone, the strongly curved, or 

 excavated, side being the anterior margin. 



