REPORT OF THE SECRETARY 39 



structures caused by al<i:al depotiits. Camp was next established on 

 the Biidger llan<:e in Montana, where a restudy of the strati<jjra]ihy 

 proved it to be much more complicated tlian was previously supposed. 

 Thence a move westward and northwestward led into thc.Blackfoot 

 country where the pre-Cambrian and Cambrian rocks were examined. 

 FoIlowin<; this various ranges in southwestern Montana were visited, 

 and the last part of the season was spent in the Teton Mountains in 

 extendinn; the studies of the previous season. Small collections were 

 made, the expedition beino; devoted mainly to field observations. 



The field expedition under the Smithsonian in charge of Mr. C. W. 

 Gilmore covered certain badland areas extendinn from Kimbetoh 

 northward to Farminiiton in the San Juan Basui. X. M(\\. AKhouirh 

 the surface indications gave every promise of yielding rich returns, 

 it was found that the majority of the leads consisted of single bones. 

 Individual skeletons had evidently been widely scattered before in- 

 terment, and only occasionally were portions of skeletons found to- 

 gether, which fact, however, did not prevent the collecting of ma- 

 terial of much scientific interest, as several news species appear to be 

 represented and some known forms are new to the fauna. The col- 

 lection, as a whole, is a decided contribution to the meagerly known 

 faunas of the area. 



The expedition under the Smithsonian by Dr. J. "W. Gidley to the 

 Snake River Valley, Idaho, inaugurated toward the end of the last 

 fiscal year, was attended with unusual success — so much so, in fact, 

 that a second expedition to the same region is now in progress. Well 

 preserved remains of a rare extinct species of horse comprise the most 

 important part of the collection, while gravel deposits in the vicinity 

 yielded a large species of bison, a giant muskox, camel, horse, and 

 other extinct animals of tlie Pleistocene period. 



Later in the year Doctor Gidley continued his researches dealing 

 with the problem of the association of early man with the extinct 

 mammalian fauna in Florida, the work being financed by contribu- 

 tions from Mr. Childs Frick and by the Smithsonian. Worth-while 

 data and material were obtained, though the expedition was greatly 

 hindered by excessive rains which rendered it impossible to work out 

 some of the most promising localities. 



Under the auspices of the Carnegie Institution of Washington, Dr. 

 Remington Kellogg, a.ssisted by Mr. Norman Boss, was occupied for 

 a month in exploration of the Eocene (Jackson) deposits in Alabama 

 and Mississippi for zeuglodont remains. The resulting small collec- 

 tion of these comparatively rare fossils was jjresented to the Museum. 

 Messrs. Kellogg and Boss also made one trip of three days to the 

 near-by IMiocene localities along Chesapeake Bay to collect cetacean 

 remains. 



