sub-co]m:]mittees. 
Archean. 
J. D. Dana, ^ ^ ^^ R. Pumpelly, 
T. Sterry Hunt, 
C. H. Hitchcock, N. H. Winchell. 
Persifor Frazer, Reporter. 
Lower Paleozoic. 
Jas. D. Dana, James Hall, J. P. Lesley. 
N. H. Winchell, Reporter. 
Associates — C. D. Walcott, A. Hyatt. 
Upper Paleozoic. 
James Hall, J. P. Lesley, J. S. Newberry. 
H. S. Williams, Reporter on the Dcvonic. 
J. J. Stevenson, Reporter on the Carbonic. 
Associate — Sir J. W. Dawson. 
Mesozoic. 
E. D. Cope, J. S. Newberry, J. W. Powell. 
G. H. Cook, Reporter. 
Associates— ^y . W. Davis, W. N. Fontaine, R. P. Whitfield. 
Cenozoic. 
E. D. Cope, J. S. Newberry, E. A. Smith. 
E. A. Smith, Reporter on the Marine Cenozoic. 
E. D. Cope, Reporter on the Interior Cenozoic. 
Quaternary and Recent. 
G. H. Cook, J. W. Poavell, N. H. Winchell. 
C. H. Hitchcock, Reporter. 
