Fishes . hite liiver, Cyprinida:. the Mississippi, Notropis galacturns in the Tennessee, and Notro-pis cercostigma in the Sabine forms an instructive series in thisregard. These fishes and the darters (Etheostomiiue) are, amongAmerican fishes, the groups best suited for the study of localproblems in distribution. Species of Dace and Shiner.—Noteworthy species in othergenera are the following: Largest and best known of the species of Notropis is thefamiliar shiner or redfin, Notropis cornutus, found in almostevery brook throughout the region east of the Missouri River. Campostoma
Fishes . hite liiver, Cyprinida:. the Mississippi, Notropis galacturns in the Tennessee, and Notro-pis cercostigma in the Sabine forms an instructive series in thisregard. These fishes and the darters (Etheostomiiue) are, amongAmerican fishes, the groups best suited for the study of localproblems in distribution. Species of Dace and Shiner.—Noteworthy species in othergenera are the following: Largest and best known of the species of Notropis is thefamiliar shiner or redfin, Notropis cornutus, found in almostevery brook throughout the region east of the Missouri River. Campostoma anomalum, the stone-roller, has the very longintestines six times the length of its body, arranged in fifteencoils around the air-bladder. This species feeds on mud andspawns in little brooks, swarming in early spring throughout 386 Series Ostariophvsi the Mississippi Valley, and is notable for its nuptial tuberclesand the black and orange fins. In the negro-chub, Exoglossnm maxillingua of the Pennsyl-. FlG. 296 -pStone-roller, Camppstoma annmalum (Rarinesque). Family nuptial tubercles and intestines coiled about the air-bladder. vanian district, the rami of the lower jaw are united for theirwhole length, looking like a projecting tongue. The fallfish, Souotilns corporalis, is the largest chub of theEastern rivers, i8 inches long, living in swift, clear rivers. Itis a soft fish, and according toThoreau it tastes like brownpaper salted when it is to this is the homed dace,Semotiliis atromaailatus, and thehorny head, Hybopsis kentiicki-ensis, both among the most widelydistributed of our river are all allied to the gudgeon{Gobio gobio), a common boys fishof the rivers of Europe, and much Fio- 297 —Head of Day-chub, Exo- , , , , gtosxum mniillinnua (Le Sueur), sought by anglers who can get Shenandoah River. nothing better. The bream, Abramis, represented by numerous species in Europe, has a deepcompressed body and a very long anal f
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