Series Ostariophysi 169 
perch as a real fish: “So many unquestionable fish he counts, 
then so many chubs which he counts, then throws away.” 
Chubs of the Pacific Slope—In the Western waters are numer- 
ous genera, some of the species reaching a large size. The species 
Fic. 131.—The Squawfish, Ptychocheilus grandis Agassiz. (Photograph by 
Cloudsley Rutter.) 
of squawfish (Ptychochetlus lucius in the Colorado, Ptychocheilus 
grandis in the Sacramento, and Ptychochetlus oregonensis in the 
Columbia) reach a length of 4 or 5 feet or even more. These 
fishes are long and slender, with large toothless mouths and 
the aspect of a pike. 
Allied to these are the ‘‘hard tails’’ (Gila elegans and Gila 
robusta) of the Colorado Basin, strange-looking fishes scarcely 
eatable, with lean bodies, flat heads, and expanded tails. The 
split-tail, Pogonichthys macrolepidotus, is found in the Sacramento. 
In the chisel-mouth, Acrocheilus alutaceus, of the Columbia 
the lips have a hard cutting edge. In Meda, very small fishes 
yee 0. 
yi ‘5 
SST 
nN ») 
Reema ine een aie: 
y 9) ; 
Sine 
Wen aaa eat 
nt 
), 
CNR 
yy. yyy) dey 
dy rods - 
RD 
Sean 
oS 
Fig. 132.—Chub of the Great Basin, Leuciscus lineatus (Girard). Heart Lake, 
Yellowstone Park. Family Cyprinide. 
of the Colorado Basin, the dorsal has a compound spine of 
peculiar structure. Many of the species of Western waters 
belong to the genus Leuciscus, which includes also many species 
