..The fishes of Illinois . irontal region broad andforeshortened, length of head to , width to , depth to body; interorbital space transversely concave, to in head;snout long and strongly decurved, to in head; mouth whollyinferior, the lips very thick and strongly papillose, the upper almost asthick as the lower, with 8 to 10 series of papillae; lower lip less incisedbehind than in Catostomus proper; eye moderate, to 6 in head, over5 in adults. Dorsal fin with 10 or 11 rays, rather low, the longest rayscarcely equaling the length of the base of the f
..The fishes of Illinois . irontal region broad andforeshortened, length of head to , width to , depth to body; interorbital space transversely concave, to in head;snout long and strongly decurved, to in head; mouth whollyinferior, the lips very thick and strongly papillose, the upper almost asthick as the lower, with 8 to 10 series of papillae; lower lip less incisedbehind than in Catostomus proper; eye moderate, to 6 in head, over5 in adults. Dorsal fin with 10 or 11 rays, rather low, the longest rayscarcely equaling the length of the base of the fin; pectorals very long,reaching § to f of distance to ventrals. Scales rather large, 7, 46-51, 6,somewhat smaller on breast and belly, but not crowded forward on sidesor in predorsal region; lateral line complete, almost straight. This peculiar sucker is distributed throughout the Great Lakeregion and along the Atlantic slope as far as the Carolinas, west-ward to Minnesota and Kansas, north to the Lake of the Woods, and. 3 awusu OOK CATOSTOMUS FINE-SCALED SUCKERS 87 south to Arkansas. It is especially abundant in swift and rapidstreams, and is rarely found in muddy water. Its avoidance ofmuddy situations is illustrated especially by its distribution in Illi-nois, not a single collection of this species having been made by usfrom the persistently turbid waters of the lower Illinoisan gla-eiation. It is rare in the southern third of the state, and was takenby us but once from any locality of extreme southern Illinois. Ithas occurred in our collections most abundantly in the headwatersand smaller tributaries of the Illinois, the Kaskaskia, the Embarras,and the Big Vermilion, in the northern and eastern parts of thestate. The most striking peculiarities of this iish are related to itshaunts and feeding habits. The large bony head and the unusuallydeveloped pectoral fins, together with the full lips and the papillosemouth, are all related to the fact that it seeks its food in the
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Keywords: ., bookcentury1900, bookdecade1900, bookidcu31924, booksubjectfishes
