REPORT OF THE SECRETARY. 11 



separate trips to the coast region near Mombasa. On December 19 the expedi- 

 tion left East Africa, crossed Uganda and went down the White Nile. 



North of Wadelai we stopped and spent over three weeks in the Lado, and 

 from Gondokoro Kermit Roosevelt and I again crossed into the Lado, spending 

 eight or ten days in the neighborhood of Rejaf. In Gondokoro we were met by 

 the steamer which the Sirdar, with great courtesy, had put at our disposal. On 

 the way to Khartoum we made collections in Lake No, and on the Bahr-el- 

 Ghazal and Barel-Zeraf. We owe our warmest thanks for the generous courtesy 

 shown us and the aid freely given us, not only by the Sirdar, but by all the 

 British officials in East Africa, Uganda, and the Sudan, and by the Belgian 

 officials in the Lado ; and this, of course, means that we are also indebted to the 

 home governments of Egypt and Belgium. 



On the trip Mr. Heller has prepared 1,020 specimens of mammals, the majority 

 of large sizes; Mr. Loring has prepared 3,163, and Doctor Mearns, 714, a total 

 of 4,897 mammals. Of birds, Doctor Mearns has prepared nearly 3,100 ; Mr. 

 Loring, 899 ; and Mr. Heller about 50, a total of about 4,000 birds. 



Of reptiles and batrachians, Messrs. Mearns, Loring, and Heller collected 

 about 2,000. 



Of fishes, about 500 were collected. Doctor Mearns collected marine fishes 

 near Mombasa and fresh-water fishes elsewhere in British East Africa, and he 

 and Cuninghame collected fishes in the White Nile. This makes in all of verte- 

 brates : Mammals, 4,S97 ; birds, about 4,000 ; reptiles and batrachians, about 

 2,000 ; fishes, about 500 ; total 11,397. 



The invertebrates were collected carefully by Doctor Mearns, with some 

 assistance from Messrs. Cuninghame and Kermit Roosevelt. A few marine shells 

 were collected near Mombasa, and land and fresh-water shells throughout the 

 regions visited, as well as crabs, beetles, millipeda, and other invertebrates. 



Several thousand plants were collected • throughout the regions visited by 

 Doctor Mearns, who employed and trained for the work a Wunyamvezi named 

 Makangarri, who soon learned how to make very good specimens and turned out 

 an excellent man in every way. 



Anthropological materials were gathered by Doctor Mearns, with some assist- 

 ance from others. A collection was contributed by Major Ross, an American in 

 the government service at Nairobi. 



I have the honor to be, very truly, yours, 



Theodore Roosevelt. 



Hon. Charles D. Walcott, 



Secretary of the Smithsonian Institution. 



STUDIES IN CAMBRIAN GEOLOGY AND PALEONTOLOGY. 



During the field season of 1909 I continued my investigations in the 

 geology of the Cambrian and pre-Cambrian rocks of the Bow Kiver 

 Valley, Alberta, Canada, and on the west side of the Continental 

 Divide north of the Canadian Pacific Railway in British Columbia. 



The first camp was made on the shores of Lake Louise, southwest of 

 Laggan. From this point work was carried forward on the high 

 mountains east, northeast, and southwest of the lake, and side trips 

 made to the valley of the Ten Peaks and across the Bow Valley in 

 the vicinity of Ptarmigan Lake. Many fine photographs were se- 

 cured, both of the beautiful scenery and the geological sections, which 



