SECRETARY'S REPORT 31 



large suites of fossil mollusks and worked out a refined biostrati- 

 graphic zonation of the Upper Cretaceous rocks in these areas. The 

 ultimate purpose of the project is widespread regional correlation, 

 based on moUusk zones, of Upper Cretaceous deposits throughout 

 the Western Interior of North America, with special emphasis placed 

 on the role of pelecypods as time-zonal indicators. The success of 

 the summer field season far exceeded Dr. Kauffman's expectations. 

 Collections superior to any previously made were obtained at numer- 

 ous localities and include a wealth of new species and new faunas. 

 Eefined biostratigraphic zonation of key Upper Cretaceous sections 

 was accomplished. Eegional studies in central and eastern Colorado 

 are now near completion, making possible future expansion to Kansas, 

 New Mexico, western and northern Colorado, and Wyommg. 



In April Dr. Eichard Cifelli, associate curator of invertebrate 

 paleontology and paleobotany, joined the oceanographic vessel R. V. 

 Chain of the Woods Hole Oceanographic Institution. The vessel 

 cruised to the Nova Scotia shelf at longitude 65° W., and then pro- 

 ceeded due south to St. Thomas. Stations were occupied at each 

 degree of latitude and the Gulf Stream. Collections of Foraminif era 

 from oblique, 200-meter plankton tows were made at each station. 

 A total of 24 samples were collected, representing excellent coverage 

 for the western Sargasso Sea and adjoining waters. 



Between July and September Dr. C. Lewis Gazin, curator of ver- 

 tebrate paleontology, accompanied by Franklin L. Pearce, cliief of 

 the laboratory of vertebrate paleontology, made an extended collect- 

 ing trip through several Western States. Their first stop was at 

 Littleton, Colo., where they joined the Smithsonian group carrying 

 on a combined paleontological-archeological excavation in a quarry 

 south of Littleton. In subsequent field work near Shoshoni, Wyo., 

 they made collections at Paleocene, Lysite lower Eocene, Badwater 

 upper Eocene, and Cameron Springs lower Oligocene localities in the 

 Wind Eiver Basin. Also in Wyoming near Kermnerer, their work 

 had excellent results at a new locality for Paleocene mammals in the 

 Evanston formation, as well as at the previously discovered locality 

 in this formation near Fossil Butte. Continuing into Montana, the 

 party spent a fruitful period at the well-known lower Oligocene 

 locality at Pipestone Springs. At the conclusion of this field season, 

 Dr. Gazin and Mr. Pearce returned to Littleton, Colo., to assist in 

 the packing and shipping to Washington of some 4 tons of fossil 

 materials, mostly mammoth, obtained by the party working on the 

 Littleton project. 



Between February and May Dr. Gazin conducted research in Guate- 

 mala, Nicaragua, Argentina, and Brazil. In Guatemala, at the 

 request of and with the support of the Government of Guatemala, 



