CORRESPONDENCE 453 



himself really familiar with the subject of flint fracture (as all 



who write authoritatively on flint implements ought to do), he 



would not have written as he has done. It cannot be too often 



emphasised that the study of flint implements is as complex 



and difficult as any other scientific subject, and that it is 



regrettable when men with deservedly great reputations fail to 



realise this fact. 



Yours faithfully, 



J. Reid Moir. 



THE DISCOVERY OF NEW PARTS IN ARCHAEOPTERYX 



From Dr. B. Petronievics 



Dear Sir, — In his review on the recent advances of Palae- 

 ontology in Science Progress, January 191 8, Mr. W. P. 

 Pycraft seems to ascribe the discovery of the new parts in the 

 British Museum specimen of Archaeopteryx to Dr. Smith Wood- 

 ward. Although I am indebted to Dr. Woodward for the per- 

 mission of the new preparations, the discovery itself is wholly 

 mine, as is evident from the following " Introductory " to the 

 article reviewed by Mr. Pycraft (Proc. Zool. Soc. April 191 7), 

 which was approved by Dr. Woodward himself. 



" Introductory 



" Some further preparation of the British Museum specimen 

 of Archaeopteryx recently done by Mr. F. O. Barlow, under the 

 direction of myself and Dr. Woodward, has resulted in the 

 complete uncovering of the right coracoid bone and the dis- 

 covery of the pubes. The work was undertaken at my request 

 after I had convinced myself, by a prolonged study of this 

 specimen in connection with Dames' two memoirs on the Berlin 

 Archaeopteryx, that the bones in question must exist buried 

 in the limestone matrix. On the results I have prepared an 

 exhaustive paper, which I hope to publish later ; but the 

 following preliminary notice, written by Dr. Woodward, who 

 has made use of our joint observations, gives a general account 

 of the important additions to our knowledge of. the pectoral 

 and pelvic arches of this primitive Jurassic bird which are now 

 made possible. Some differences of opinion between us are 

 indicated in footnotes. 



