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pp. 620-707. 



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vol. xliii (1887) pp. 206-11. 



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vol. xix (1889) pp. 258-64. 



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Pathologie & Therapie, vol. xv, Vienna, 1898. 



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 pp. 326-49. 



Discussion. 



Dr. A. Smith Woodward welcomed this paper as another con- 

 tribution to our knowledge of the Cretaceous Dinosaurs, which had 

 often been discussed by the Society. He had visited Transylvania 

 with the Author, and was able to confirm several of his interesting 

 geological observations. He thought the Author's interpreta- 

 tion of the Dinosaurian fauna in question, as representing the life 

 of an island, both ingenious and satisfactory. He was glad to 

 add that the most important part of the Author's collection was 

 already in the British Museum, and he hoped that the remainder 

 would follow. 



Prof. W. W. Watts was much interested to learn that se- 

 dentary and armoured Dinosaurs had exceptionally small brains. 

 The geological record seemed to show that ' passive resisters ' 

 relying upon armour, horns, etc. were always worsted in com- 

 petition with those developing teeth, claws, and speed. The still 

 more active flying creatures would naturally require better brains, 

 and he asked the Author if it were possible to indicate whether 

 the development of wings had preceded or followed the brain- 

 development. 



The Chairman (Mr. P. D. Oldham) remarked on the interest 

 of the paper, as illustrating the Lyellian principle of continuity 

 between the past and the present, by the evidence which had been 

 produced of the existence in Cretaceous times of conditions very 

 similar to the present-day survival of an atavistic fauna in the 

 Australian islands. 



The Author, replying to Prof. Watts's question, said that he 

 believed the development of brain and power of flight to be 

 reciprocal, and so it was not possible to aver that one gave rise to 

 the other. While agreeing completely with Prof. Watts that the 

 development of armour was likely to affect the quality of the brain, 

 he nevertheless pointed out that the reduction of brain is remark- 

 able in all Dinosaurs, and not only in the armoured forms. 



In answer to the Chairman's remark, the Author stated that, in 

 the paper itself, he had not omitted to draw attention to the recent 

 Marsupial fauna of Australia. 



[April 11th, 1923.] 



