TITLES AND ABSTRACTS OF PAPERS 141 



culates with Marsupials and Monotremes, concluding that they were allied to 

 the latter group, which appear to be degenerate descendants. 



Discussion 



Mr. GiDLEY dissented from Doctor Broom's interpretation of the supposed 

 pelvis of Ptilodus as a scapulocoracoid, giving reasons why he was unable to 

 accept this view. Professor Osborn commented briefly on the importance of 

 Doctor Broom's contribution. 



The meeting then adjourned. 



The earlier part of the morning of Thursday, January 1, having been 

 occupied by a general session of the Society, the Vertebrate section was 

 called to order by Professor Lull at 11.40 a. m. and the program of 

 papers continued as follows :- 



NOTE ON THE AMERICAN TRJA88IG GENUS PLACERIAS LUCAS 

 BY ROBERT BROOM 



The author regards this humerus as undoubtedly Anomodont and with much 

 probability belonging to a species of Dicynodon. It is doubtfully distinguish- 

 able from D. (Eannemeyeria) simocephalus Weithofer of the Upper Trias of 

 South Africa. 



SKELETON OF NOTHARCTUS, AN EOCENE LEMUROID 

 BY W. K. GREGORY 



The author exhibited photographs of the skull and principal parts of the 

 skeleton in comparison with the corresponding parts of the modern Lemur, 

 pointing out the fundamental resemblances between them and interpreting the 

 differences as mostly due to progressive or divergent specializations in the 

 modern type. 



PHTLETIG RELATIONSHIPS OF THE LEMUROIDEA 

 BY W. K. GREGORY 



The author exhibited on the screen a series of photographs of skulls of the 

 principal genera of modern Lemur oidea, pointing out the affinities and struc- 

 tural evolutionary stages in the several groups. 



Discussion 



Professor Osborn called attention to the importance of these researches, 

 which are fundamental to a satisfactory understanding of the affinities and 

 evolution of the whole order of Primates. Doctor Matthew inquired as to the 



