Bull. U. S. F. C. 1891. Fish-cultural Investigations in Montana and Wyoming. (To face page 60 — 15.) 
Plate XX. 
1. LEUCISCUS HYDROPHLOX (Cope). Chub. Natural size. 
2. LEUCISCUS GILLI, sp.nov. Gill’s Chub. Natural size. 
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3. LEUCISCUS ATRARIUS (Grd.). Utah Chub. Three-fourths natural size. 
