414 Mr. G. A. Boulenger 07i the 



9. Rana palustris, Leconte, 1825. 

 H. jmrdalis, Harl., 1825. 



North America, east of the Mississippi. 



10. Rana draytonii, B. & G., 1852. 



R. lecontei, B. &G., 1853. — R. nigricans, Hallow., 1854. — R. longtjyes, 

 Hallow., 1859. — R. aurora draytonii, Camp, 1917. 



Western North America, from British Columbia to the 

 mouutaius of Lower California, up to 4000 ft. altitude. 



11. Rana aurora, B. & G., 1852. 

 R. temporaria aurora, Cope, 1883, — R. agilis aurora, Cope, 1886. 



Washington Territory, Oregon, and California. 



12. Rana pretiosa, B. & G., 1853. 



R. temporaria pretiosa, Cope, 1889.— -R. pretiosa liiteiventris, H. B. 

 Thomps., 1913. 



North America, from the Rocky Mountains westwards, 

 from British Columbia to California. 



13. Rana cantabrigensis, Baird, 1854. 



R. cantahrigensis 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 



