Fishes . ilG. 308. — Pharyngealteeth ot Oregon Suck-er, Catostomus Fig. 809 —Razor-back Sucker, Xyrtiuchen cypho (Lockington). Green River, Utah. Catostomus, known by their skulls, are found in the Plioceneof Idaho. The Loaches.—The Cobitidcc, or loaches, are small fishes, allless than a foot in length, inhabiting streams and ponds ofEurope and Asia. In structure they are not very different fromminnows, but they are rather eel-like in form, and the numerous Series Ostariophysi 395 long barbels about the mouth strongly suggest affinity withthe catfishes. The scales are small, th
Fishes . ilG. 308. — Pharyngealteeth ot Oregon Suck-er, Catostomus Fig. 809 —Razor-back Sucker, Xyrtiuchen cypho (Lockington). Green River, Utah. Catostomus, known by their skulls, are found in the Plioceneof Idaho. The Loaches.—The Cobitidcc, or loaches, are small fishes, allless than a foot in length, inhabiting streams and ponds ofEurope and Asia. In structure they are not very different fromminnows, but they are rather eel-like in form, and the numerous Series Ostariophysi 395 long barbels about the mouth strongly suggest affinity withthe catfishes. The scales are small, the pharyngeal teeth few,and the air-bladder, as in most small catfishes, enclosed in acapsule. The loaches are all bottom fishes of dark colors,tenacious of life, feeding on insects and worms. The speciesoften bury themselves in mud and sand. They lie quiet onthe bottom and move very quickly when disturbed much afterthe manner of darters and gobies. Species of Cobitis and Mis-giirnus are widely distributed from England to Japan. Nema-chilus barbatulus is the commonest Europe
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