82 REPOUT OF JSTATIOK^AL MUSETJM, 1925 



at the same time made collections of Mississippian fossils. Abundant 

 faunas of crinoids were discovered, many of the species being new. 



Dr. E. O. Ulrich spent a part of the field season in further studies 

 of the Upper Cambrian and Ozarkian systems of Missouri and 

 Wisconsin. The object of his work was to secure data toward the 

 solution of certain stratigraphic problems. Late in the year, ac- 

 companied by Doctor Resser and in cooperation with the geological 

 department of Princeton University, he started on a three months' 

 field trip through various countries of Europe. The efforts of the 

 party are to be directed mainl}'^ to a study of the Cambrian and 

 Ordovician systems. 



Erwin R. Pohl was detailed for a short time to make collections 

 from the celebrated Rysedorph conglomerate of eastern New York. 

 A good series of fossils resulted from this work. 



In cooperation with the National Park Service, C. W. Gilmore 

 visited the Grand Canyon National Park, Ariz., for the purpose 

 of accompanying the Doheny scientific expedition as a scientific 

 observer, to investigate and make collections of fossil tracks ex- 

 posed in the Coconino sandstone on the Hermit Trail, and at the 

 same time to prepare an exhibit of the tracks in situ by the side of 

 the trail. Two weeks were spent in Havasupai Canyon with the Do- 

 heny expedition which, under the leadership of Samual Hubbard, 

 was engaged in the investigation of certain evidence relating to 

 the early appearance in this region of prehistoric man. Upon the 

 disbandment of the Doheny party, Mr. Gilmore returned to Grand 

 Canyon where he spent two weeks at the footprint locality. A 

 series of slabs, some 2,000 pounds in weight, were collected and 

 shipped to the Museum. Under instructions from the director of 

 the National Park, slabs were shipped to other museums and two 

 placed in the museum at the Administrative Building at Grand 

 Canyon. Several hundred feet of track-covered sufface were cleared 

 off, leaving a permanent exhibit near the trail. Preliminary study 

 of the tracks has developed the fact that, in the absence of other 

 fossil criteria, these imprints will probably furnish important cor- 

 relative evidence. 



In December, 1924, Dr. J. W. Gidley was detailed to visit the 

 region around Melbourne, Fla. His work was undertaken in co- 

 operation with the Bureau of Ethnology, and since the details be- 

 long more properly in that branch, they will not be given here 

 except to state that he was enabled to meet local collectors and 

 secured an interesting collection of fossil mammals. Later he wa,s 

 similarly detailed to visit Adel, Iowa, for the purpose of studying 

 the geology of a formation in which had been found certain human 

 artifacts. Late in the fiscal year he was again detailed to work in 



