L44 



DINOSAUETA. 

 Fig. 23. 



Brontosaurus ecccelsits, Marsh. — Left side of pelvis ; from the Upper Jurassic of 

 North America, -,'g • &, acetabulum ; is, ischium ; p, pubis ; /, pubic 

 foramen. (From the ' Amer. Journ.') 



Genus ATLANTOSAURUS, Marsh \ 



ftyn. Titanosawus, Marsh 2 . 



The type genus. Pour sacral vertebra), of which the centra of 

 the second and third are constricted interiorly. 



1 Amer. Journ. ser. 3, vol. xiv. p. 514 (1877). 



2 Ibid. p. 88. — Preoccupied. 



