Bull. U. S. F, C. 1891. Fish-cultural Investigations in Montana and Wyoming. (To face page 60 — 14.) 
Plate XIX. 
1. RHINICHTHYS DULCIS (Grrl.). Dace. About one and one-third times natural size. 
2. MyLOCHEILUS CAURINUS (Rich.). Columbia Chub. About five-eighths natural size. 
3. PTYCHOCHEILUS OREGONENSIS (Rich.). Squawfish. About one-half natural size. 
