Smithsonian miscellaneous collections . but the scalesgenerally are dotted with dark. Its ordinary length is about a is caught in large quantities and is a staple market fish butchiefly utilized by the Chinese. Another very common species is the chub of Utah Lake, orthe great chub common in the streams of the plateaux and bot-toms of the Rocky Mountains—the Leiiciscus lineatus of recentichthyology. It is typical of a group of species (Tigoma) charac-terized by small or moderate-sized scales which are less imbricatedthan usual; the pharyngeal teeth are essentially like those of Leu-cisc
Smithsonian miscellaneous collections . but the scalesgenerally are dotted with dark. Its ordinary length is about a is caught in large quantities and is a staple market fish butchiefly utilized by the Chinese. Another very common species is the chub of Utah Lake, orthe great chub common in the streams of the plateaux and bot-toms of the Rocky Mountains—the Leiiciscus lineatus of recentichthyology. It is typical of a group of species (Tigoma) charac-terized by small or moderate-sized scales which are less imbricatedthan usual; the pharyngeal teeth are essentially like those of Leu-cisciis crassicauda. The color is very dark—blackened—and thisdarkness extends to sides and belly even, especially about the edgesof the scales, for the centers are somewhat paler; this arrangementof colors has given rise to the rather misleading scientific name gill] NOTEWORTHY EXTRA-EUROPEAN CYPRINIDS 315 (lineatus) of the species. Otherwise, as Jordan and Evermann add,the species varies greatly with age and surroundings. It grows. Fig. 66.—Chub of Utah Lake, Leitciscus lineatus. After Gill. to a length of a foot or more—at least to fifteen inches to Jordan (1884) it is excessively abundant in UtahLake and, as it ascends the streams to spawn almost simultaneouslywith the trout {Salmo mykiss clarkii?), it is extremely destructiveto the young of the latter. It is taken in considerable number inseines, and is sold in the markets of Salt Lake City and other nearly related to the chubs and daces is a genus whose head-quarters are in the Gila river and from this it has derived its name{Gila). The physiognomy of the fishes is characteristic, the caudalpeduncle being exceptionally slender and elongate; the caudal finis deeply forked and enlarged by rudimentary or fulcrum-like rayswhich increase its extent above and below the peduncle; the scales
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