140 PROCEEDINGS OF THE PALEONTOLOGICAL SOCIETY 



therium and the Proboscidea as parallelism, and cited certain reasons for this 

 view. Doctor Matthew suggested that in order to determine whether these 

 resemblances were to be interpreted as due to parallelism or to affinity it 

 would be desirable to find out to what extent they were also present in similar 

 adaptive types in other orders of mammals, in particular Diprotodon and 

 Arsinoitherium. The author replied that he had failed to find much resem- 

 blance in Diprotodon, and that he regarded Arsinoitherium as also related to 

 the Proboscidea through its Hyracoid affinities. 



The same speaker then presented the following paper; 20 minutes: 



ANALYSIS OF TEE PTROTHERIUM FAUNA 

 BY FEEDEEIC B. LOO MIS 



The author analyzed the fauna according to its apparent adaptation for 

 grazing, browsing, or other habits of life. It appeared to be in large part a 

 grazing, to a less extent a browsing, fauna, mostly adapted to open country, 

 little or nothing of an aquatic or river bottoms element. It indicates that the 

 country at that epoch was not unlike its present character. 



Discussion 



Professor Scott spoke of certain contrasts between this and the Santa Cruz 

 fauna. The rodent fauna was much less diversified. Edentates, and espe- 

 cially ground-sloths, were very much scarcer. The large proportion of large 

 mammals is a no less remarkable difference. 



The next paper was presented by the author and illustrated with lan- 

 tern slides; 10 minutes: 



NEW METHODS JN RESTORING EOTITANOPS AND BRONTOTHERIUM 

 BY H. F. OSBOEN 



The author explained the anatomical methods used in the recent restorations 

 of these animals by the American Museum. 



There was then presented 



STRUCTURE AND AFFINITIES OF THE MULT ITU BERCV LATA 

 BY ROBERT BROOM 



The author reviewed briefly the principal types of this order of mammals 

 and stated how much was known of each. The recent description of a Ptilodus 

 skeleton by Mr, Gidley and of a fairly complete skull of Polymastodon here 

 announced were important additions to our knowledge of the group. He de- 

 scribed the principal features of the skull of Polymastodon, and stated the 

 results of his restudy of the Ptilodus skeleton. He compared the Multituber- 



