No. 521] 



sM'uoron i)i\os.\rh's 



2H5 



it seems to the speaker that the present is a suitable 

 occasion in which not merely to demonstrate the utterly 

 absurd character of the opinions of Hay, Tornier, and 

 Sternfeld, but also to bring out into clearer light the 

 reasons why America]] paleontologists, and for that 

 matter the leading paleontologists of Europe also, have 

 concurred in regarding the sauropod dinosaurs as having 

 possessed the power to assume the position which has 

 hitherto been given them. At the risk, therefore, of 

 occupying sonic of your precious time 1 wish to take up 

 the subject a little more thoroughly and by the help of a 

 series of illustrations to make my meaning clear. 



I shall begin with the structure of the pelvis in the 

 sauropod dinosaurs. I herewith give illustrations (Fig. 

 4) taken from the specimens in the Carnegie Museum of 

 the pelves of Brontosaurus, Diplodocus, and Eaplocan- 

 thosaiiniy. the last closely allied to ( 'rtinsan rus of ( )w< n. 



Any one who has a merely rudimentary knowledge of 

 the pelves of the dinosauria in general knows that they 

 are distinctly ornithic in type, and not lacertiliau, nor 

 crocodilian, Professor Tornier to the contrary notwith- 



