Pareioplite, or Mailed-cheek Fishes 655 
is armed with long spines which are erected when the fish is 
disturbed. This makes it almost impossible for any larger 
fish to swallow them. 
Fie. 555.—Ceratocottus diceraus (Cuv. & Val.). Tolstoi Bay, Alaska. 
The genera Cottus and Uranidea include the miller’s thumbs, 
also called in America, blob and muffle-jaws, of the Northern 
Fie. 556.—Elanura forficata Gilbert. Bering Sea. 
rivers. These little fishes are found in Europe, Asia, and America 
wherever trout are found. They lurk under weeds and stones, 
Fig. 557.—Yellowstone Miller’s Thumb, Cottus punctulatus (Gill). 
Yellowstone River. 
moving with the greatest swiftness when disturbed. They are 
found in every cold stream of the region north of Virginia, and 
they vie with the sticklebacks in their destruction of the eggs 
