638 



SCIENCE 



[N. S. Vol. XXIX. No. 746 



Artinskian and " Permo-Carbonifeious " of Eu- 

 rasia. 



EEPOBTS OF COMMITTISES 



Through Mr. Arthur Keith the Committee on 

 Geologic Nomenclature reported that it had or- 

 ganized by the election of Professor T. C. Cham- 

 berlin as chairman and Mr. A. Keith as secretary. 

 The committee is constituted as follows: 



For the Geological Society of America: Pro- 

 fessors T. C. Chamberlin and W. B. Scott. 



For the U. S. Geological Survey. Mr. Arthur 

 Keith and Dr. David White. 



For the Association of State Geologists: Dr. J. 

 M. Clarke and Professor E. A. Smith. 



For Canada — Geological Survey: Professor F. 

 D. Adams. Other official surveys: Dr. W. G. 

 Miller. 



For Mexico: Dr. J. G. Aguilera and Dr. C. 

 Burckhardt. 



The Photograph Committee, Mr. N. H. Darton, 

 reported that there had been fevp accessions during 

 the year and practically no use of the collection. 



On account of the length of the program the 

 council formed a special section for the considera- 

 tion of certain papers forming part of a sym- 

 posium on correlation which had been arranged 

 for by Mr. Bailey Willis, chairman, and Dr. F. 

 P. Gulliver, secretary, of Section E (Geology and 

 Geography) of the American Association for the 

 Advancement of Science. For the sake of record 

 the whole list of these papers, with the times 

 when they were read, follows. 



MONBAT, DECEMBEE 28 



Before Section E. (By title in G. S. A. program.) 



Pre-Cambrian 

 11:00 A.M. to 12:10 P.M. 

 C. R. Van Hise : " Principles of Pre-Cambrian 

 Correlation." 



F. D. Adams : " The Basis of Pre-Cambrian Cor- 

 relation." 



Early and Middle Paleozoic 

 3:30 to 4:00 P.M. 

 C. D. Walcott : " Evolution of Early Paleozoic 

 Faunas in Eelation to their Environment." 



4:00 to 5:50 P.M. 

 A. W. Grabau : " Physical and Faunal Evolu- 

 tion of North America in the Late Ordovicie, 

 Siluric and Devonic Time." 



4:50 to 5:30 P.M. 

 Stuart Weller : " Correlation of Middle and 

 Upper Devonian and Mississippian Faunas of 

 North America." 



TUESDAY, DECEMBEB 29 



Before a temporary section of the 6. S. A. 

 Late Paleozoic 

 11:00 A.M. to 12:05 P.M. 

 G. H. Girty : " Physical and Faunal Changes of 

 Pennsylvanian and Permian in North America." 

 David White : " The Upper Paleozoic Floras, 

 their Succession and Range." 



Vertebrates 

 2:00 to 3:15 P.M. 

 S. W. Williston : " Environmental Relations of 

 the Early Vertebrates." 



H. F. Osborn: "Environment and Relations of 

 the Csenozoic Mammalia." 



Mesozoio and Tertiary 

 3:15 to 4:00 P.M. 

 T. W. Stanton : " Succession and Distribution 

 of Later Mesozoic Invertebrate Faunas." 



4:00 to 5:15 P.M. 



W. H. Dall : " Conditions Governing the Evolu- 

 tion and Distribution of Tertiary Faunas." 



Ralph Arnold: "Environment of the Tertiary 

 Faunas of the Pacific Coast." 



WEDNESDAY, DECEMBEB 30 



Before a temporary section of the G. S. A. 



Tertiary and Quaternary 

 10:50 to 11:25 A.M. 

 F. H. Knowlton : " Succession and Range of 

 Mesozoic and Tertiary Floras." 



11:25 A.M. to 12:25 P.M. 



R. D. Salisbury: "Physical Geography of the 

 Pleistocene with Special Reference to Conditions 

 Bearing on Correlation." 



D. T. MacDougal : " Origination of Self-gener- 

 ating Matter and the Influence of Aridity upon 

 its Evolutionary Development." 



2:30 to 3:45 P.M. 



T. C. Chamberlin: " Diastrophism as the Ulti- 

 mate Basis of Correlation." 



After the reading of scientific papers had 

 been finished, the society met again in general 

 session and Professor J. M. Clarke proposed a 

 vote of thanks to the citizens of Baltimore, the 

 authorities of the Johns Hopkins University and 

 in particular to the members of the department 

 of geology for the welcome accorded to the society 

 and the particularly complete arrangements made 

 for the work of the meeting and the comfort and 

 eajoyraent of those in attendance. The vote was 



