FAMILY X. SALMONID.E. 97 



in the upper tributaries of the Rio Yaqui. Mr. A. V. Temple also 

 told me trout were found in the Pacific coast streams west of the city 

 of Durango. In the American Naturalist, 1886, 735, I quote the fol- 

 lowing from Prof. E. D. Cope: "The most southern salmon. I owe 

 to' my friend, Professor Lupton, two specimens of a black-spotted 

 trout from a locality far south of any which has hitherto yielded 

 Salmonidae. They are from streams of the Sierra Madre, of Mexico, 

 at an elevation of between 7,000 and 8,000 feet, in the southern part of 

 the State of Chihuahua, near the boundaries of Durango and Sinaloa. 

 The specimens are young, and have teeth on the basihyal bones, as 

 in Salmo purpuratus, which they otherwise resemble." 



