BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



Vol. 28, pp. 973-986 DECEMBER 19, 1917 



PROCEEDINGS OF THE PALEONTOLOGICAL SOCIETY 



SECOND EEPORT OF THE COMMITTEE ON THE NOMEN- 

 CLATURE OF THE CRANIAL ELEMENTS IN 

 THE PERMIAN TETRAPODA * 



By William K. Gkegory, Secretary of the Committee 



WITH APPEKDIOES BY E. BROOM^ D. M. S. WATSON, AND S. W. WILLISTON 



{Read before the Paleantological Society December 18, 1916) 



CONTENTS 



Page 



Introduction 973 



List of approved names 974 



List of names as to which there is divergence of opinion 974 



Appendix A. — ^Comments by R. Broom 975 



Appendix B. — Comments by D. M. S. Watson 979 



Appendix C. — Comments by S. W. Williston 985 



Introduction 



On June 29, 1915, Prof. H. F. Osborn requested Prof. S. W. Williston 

 to act as chairman of a committee consisting of Messrs. S. W. Williston, 

 E. C. Case, R. L. Moodie, D. M. S. Watson, and W. K. Gregory, the object 

 of the committee being to consider and revise the names of the cranial 

 elements of the earliest Tetrapoda. Dr. R. Broom was later appointed 

 by the cliairman. The committee has never been able to assemble and 

 discuss the matter together, but each member has expressed his own view^s 

 in correspondence with the Secretary and has had opportunity to consider 

 the views of the other members of the committee. The first report of the 

 committee was made by the Secretary at the Washington meeting of the 

 Paleontological Society in December, 1915. 



It is not yet possible to secure entire unanimity in the committee either 

 as to the principles which must be followed in the adoption of names for 



* Manuscript rocoivod by the Secretary of the Geological Society April 30, 1917. 



(973) 



