LIST OF ILLUSTRATIONS. 
EXPLORATIONS IN COLORADO AND UTAH, 
Plate I. 
Fig. i. Yellow-finned Trout {Salmo mykiss macdonaldi) 12 
2. Green-back Trout (.Salmo »i!/fciss stowias) 12 
3. Red-throated Trout {Salmo mykiss) 12 
Plate II. 
Fig. 4. Red-throated Trout {Salmo mykiss lewisi). Young 14 
6. Lake Tahoe Trout {Salmo mykiss henshawi) 14 
6. Colorado River Trout {Salmo mykiss pleuriticus) 14 
Plate III. 
Fig. 7. Rio Grande Trout {Salmo mykiss spihirus). Adult 16 
8. Rio Grande Trout {Salmo mykiss spilurus). Young 16 
9. Utah Lake Trout {Salmo mykiss virglnalis) 16 
Plate IV. 
Fig. 10. Waha Lake Trout {Salmo mykiss bouvieri) 20 
11. Humpback Sucker {Xyrauchen cypho) 20 
Plate V. 
Fig. 12. Uncompahgre Sucirer {Xyrauchen imcompahgrc) 26 
13. The “Sucker ’ {Chasmistcs iiorus) 26 
RECONNOISSANCE OF THE STREAMS AND LAKES OF THE YELLOWSTONE NATIONAL PARK. 
Plate VI.— Map of Yellowstone Park 41 
Plate VII. 
Fig. 1. Gray Sucker (CafosfomusariseMs) 42 
2. Red Horse Sucker {Catostomus ardens) 42 
3. The Dace {Rhinichthys dulcis) 42 
4. Agosia nubila 42 
Plate VHI. 
Fig. 5. The Utah Chub (Leaciscasatrarms) 44 
6. Leuciscus hydrophlox 44 
7. The Grayling (TAi/maHits sfpuj/er, var. ontariensis) 44 
Plate IX. 
Fig. 8. Mountain Whitefish {Coregonus wilUamsoni, var. cismontanus) 46 
9. Mountain Whitefish {Coregonus ivilliamsoni, var. cismontanus). Head of breeding male T. . 46 
Plate X. 
Fig. 10. Red-throated Trout (Saimo mykiss) 48 
11. Red-throated Trout {Salmo mykiss). Young 48 
12. Miller’s Thumb {Coitus bairdi, var. punctulalus) 48 
Plate XI. — Yellowstone River; rapids above the Upper Falls 50 
XII. — Upper Falls of the Yellowstone River 50 
XIII. — Lower or Great Falls of the Yellowstone River 50 
XiV. — Crystal Falls of Cascade Creek 52 
XV.— Tower Palls of Tower Creek 54 
XVI. — Undine Palls of Lava Creek 56 
XVII. — Ospre.v Palls of Gardiner River 58 
Plate XVIII. 
Fig. 1. Rustic Falls of Glen Creek 58 
2. Beaver Lake, showing beaver dams 58 
Plate XIX. — Virginia Cascade of Gibbon River 60 
XX. — Gibbon Falls of Gibbon Itiver 60 
VII 
