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EDITED By ene ee me a iene al 
THOMAS C. CHAMBERLIN AND ROLLIN D. SALISBURY _ 
With the ‘Active Gallsbeatiod of 
SAMUEL W. WILLISTON ___ ALBERT JOHANNSEN _ ee, 
_ Vertebrate Palenaealonys Deny ie _ Petrology Nini pins) 2: 
STUART WELLER . at ROLLIN T. CHAMBERLIN __ ie uae 
: ! Invertebrate Paleontology : Dynamic Geology | : mae 
ALBERT D. BROKAW. idan sid 
Economic Geology 
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