1895.] Zoology. 491 
the fish-faunas of the streams flowing into Hudson Bay and into the 
Gulf of Mexico on the Atlantic slope, and into Puget Sound and into 
the Columbia River on the Pacific slope. 
Mr. Eigenmann has worked out the relations that these different river 
faunæ bear to each other by an elaborate system of comparison, and 
tinds that 6 of the 65 species are found on both the east and west slope 
of the continent. Of 42 species found in the Winnipeg system 8 are 
found in the Saskatchewan, and not in the Red River of the North; 16 
found in the Red River of the North were not found in the Saskatche- 
wan; 13 of 17 species taken in the Missouri are found in the Saskatche- 
wan. The species of the Saskatchewan, with the exception of the new 
ones, are all found in the Mississippi basin. 11 Families of the 
Mississippi basin have not yet been found in the Saskatchewan basin. 
Only one variety was found in the Fraser that was not found also in 
the Columbia. 
Sixty-five species were obtained, of which 20 per cent. were new to 
science. They belong to 14 families and 37 genera. 
The notable additions to the knowledge of the North American fish- 
fauna made by these explorations is shown in the following summary of 
the results of the author’s work. 
1. A species of Pantosteus (P. columbianus=P. jordanii of the Mis- 
souri) discovered on the Pacific slope. 
2. Noturus flavus found at the base of the Rockies at Craig, Mont. 
3. Four new species of Notropis added to the East Canadian fauna. 
4. Two new species of Agosia added to the Pacific fauna. 
5. A new species of white-fish ( Coregonus coulterii) discovered in the 
Rocky Mountain streams of a restricted region in British Columbia. 
6. The family of Percopside found to have a representative on the 
Pacific slope in the new genus Columbia. 
7. Several species of Etheostoma found in Canada, among them two 
new species. 
8. One new Cottus (C. onychus) added to the fauna of the Saskat- 
chewan. 
9. A new Cottus (C. philonips) discovered at Field, B. C. 
10. A species of Lota reported from both the Columbia and the 
Fraser. 
11. It was discovered that the fins of the fishes of the Pacific slope 
vary from the fins of the fishes of the Atlantic slope in definite direc- 
tions. 
12. The extent of variation between the species of any given family 
of fishes on the Pacific coast was found to be greater than that between 
the species of the same family on the Atlantic slope. 
