TITLES AND ABSTRAf'TS OF PAPERS ZiO 



specimen was found in 1898 by Doctor Wieland and it is lioped that more of 

 it may be secured. The great size of the beast may be judged by the length 

 of one cervical centrum, which measures about one meter; posteriorly the 

 vertebrae are not so large relatively. 



OSTRICH DINOSAUR 8TRUTIII0MIMUS AJSD A. RESTUDY OF 0RNITH0LESTE8 



BY H. F. OSBORN 



(Abstract) 



This paper, which has since been published in Bulletin American Museum 

 of Natural History, volume XXXA^, 3917, pages 733 to 771, was discussed, as 

 follows : Mr. Granger added to the four theories of the adaptation and habits 

 of the animal a fifth, that of egg-sucking, which may have some bearing on 

 the extinction of the larger reptiles. Professor Lull questioned the theory of 

 the browsing habit of the animal and also the one advanced relating to its 

 speed adaptation. 



SKELETON AND RESTORATION OF GAMARASAURUS 

 BY H. F. OSBORN AND C. C. MOOK 



(Ahstract) 



In the discussion by Messrs. Lull, Hay, Barbour, and Franklin it was shown 

 that the lizards and crocodiles, which we usually think of as crawlers, some- 

 times get up on their feet and walk in a recognized quadrupedal manner. 

 From this it was argued that the dinosaurs at times walked like mammals, 

 and, again, may have sprawled like a crocodile. 



Doctor Barbour has observed that crocodiles may walk leisurely, bearing 

 the whole weight on their feet; but if hurried they drop down and wriggle 

 along, using the tail and limbs, just as in swimming. 



SUCCESSION OF THE MIOCENE FAUNAS IN THE JOHN DAY REGION 

 BY J. C. MEBRIAM, CHESTER STOCK. AND CLARENCE L. MOODY 



{Abstract) 



Doctor Merriam read the paper, which was a discussion of the problems of 

 stratigraphy of this Oregon region. Some excellent photographs, stratigraphic 

 columns, and faunal lists were shown by lantern slides. Professor Osborn 

 directed attention to the great advance in exact stratigraphic and faunal work 

 in the John Day region since the early reports of Marsh and Cope. 



RESTORATIONS OF THREE PLEISTOCENE SKULLS FROM EUROPE 

 BY J. H. MC GBEGOR 



(Abstract) 



Perhaps the most interesting- ])aper was this discussion of the early types 

 of man in Europe. Professor McGregor illustrated with casts both the original 

 fossil skulls and his restorations. He pointed out the characteristic features 

 XV — Bull. Geol. Soc. Am., Vol. 28, 1916 



