414 Mr, G. A. Boulenger on the 
9. Rana palustris, Leconte, 1825. 
R. pardalis, Harl., 1825. 
North America, east of the Mississippi. 
10. Rana draytonii, B. & G., 1852. 
R. lecontei, B. & G., 1853.— R. nigricans, Hallow., 1854.—R, longipes, 
Hallow., 1859.—R. aurora draytoni, Camp, 1917. 
Western North America, from British Columbia to the 
mountains of Lower California, up to 4000 ft. altitude. 
11. Rana aurora, B. & G., 1852. 
R. temporaria aurora, Cope, 1888.—R. agilis aurora, Cope, 1886. 
Washington Territory, Oregon, and California. 
12. Rana pretiosa, B. & G., 1853. 
R. temporaria pretiosa, Cope, 1889.—R. pretiosa luteiventris, H. B. 
Thomps., 19138. 
North America, from the Rocky Mountains westwards, 
from British Columbia to California. 
13. Rana cantabrigensis, Baird, 1854. 
R. cantabrigensis latiremis, evittata, Cope, 1886. 
Western North America, from Alaska and Great Bear 
Lake to British Columbia, Alberta, Assiniboia, Manitoba, 
Minnesota, and Illinois. 
14. Rana silvatica, Leconte, 1825. 
R. pennsylvanica, Harl., 1825. 
Eastern North America, from Manitoba, Ontario, and 
Quebec to South Carolina. 
15. Rana godmani, Gthr., 1900. 
Costa Rica (Rio Sucio). 
I cannot help thinking that R. godmani will prove to be 
