File:Report of explorations in Colorado and Utah during the summer of 1889 - with an account of the fishes found in each of the river basins examined (1889) (14586783500).jpg

Identifier: reportofexplorat00jord (find matches)
Title: Report of explorations in Colorado and Utah during the summer of 1889 : with an account of the fishes found in each of the river basins examined
Year: 1889 (1880s)
Authors: Jordan, David Starr, 1851-1931
Subjects: Fishes Fishes
Publisher: Washington : G.P.O.
Contributing Library: Harold B. Lee Library
Digitizing Sponsor: Brigham Young University

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
in length; depth 4;; scales 15-67-10; axils red in the male. Teeth oftenirregular in number, sometimes 1, 4-4, 1. NOTE ON THE GENERIC NAME LEUCISCUS. For a number of years American writers have referred our species with the teeth 1or 2, 4-5, 2, and with hooked tips, to the genus Squalius Bonaparte. Comparing the American species with the European representatives of this type,we find that while there is a general agreement in technical characters the Europeanspecies have much larger and looser, scales, and the scales have the radiating stria?more prominent. The European species have in fact the same squamation as ourgenus Notemigonus. The teeth in Squalius proper are 2, 5-5, 2, in all species, so faras examined.
Text Appearing After Image:
EXPLORATIONS IN COLORADO AND UTAH. 21 There is, however, in Europe a subgeneric group called Telestes by Bonaparte,which approaches much more nearly to the American forms. The scales in Telestesare small, ranging from GO to 80, and the teeth are 2, 4-5, 2. I know of no characterby which the American species called Tigoma can be set off from Telestes, nor does anydefinite character exist by which Siboma, Cheonda, and Clinostomus can be separatedfrom Tigoma. Protoporus Cope is apparently also bused on a young Tigoma. It is, however, true that European writers generally hold the distinctions betweenTelestes and Squalius as of verjr slight value, and the figures and specimens accessibleto us seem to show a pretty regtdar graduation from one type to the other. Never-theless, no American species of this type is a near ally to Squalius cephalus, and nonehave the pharyngeal bones equally armed with 5 teeth in the main row so far as weknow. For the present we may unite Tigoma with Telestes and

Note About Images