Bull. U. S. F. C. 1891. Fish-cultural Investigations in Montana and Wyoming. (To face page 60 — 17.) 
Plate XXII. 
1 . TKYMALLUS SIGNIFER (Rich.). Grayling. Adult. One-half natural size. 
2. THYMALLUS SIGNIFER. Young. 
3. COTTUS BA1RDI PUNCTULATUS (Gill). Blob. Two-thirds natural size. 
