132 



VERTEBRATE ANIMALS OF THE UNITED STATES 



IX, 19 to 21; anal 16 to 18: southeastern Oregon; Coast Range, Cali- 

 fornia, Sacramento River region; Alaska; very common. 



C. rhotheus Rosa Smith. Length 100 mm.; head 3; depth 4.5; color 

 dark gray, spotted and mottled; rays of dorsal fins VII or VIII, 16 or 17 ; 

 anal 11 or 12: Columbia River basin; common. 



C. punctulatus (Gill). Length 125 mm.; head 3; depth 4.75; color 

 olivaceous, spotted with black and with 5 or 6 dark lateral cross bars; 

 rays of dorsal fins VII or VIII, 17 or 18; anal 11 or 12: head waters of 

 Green River, Wyoming; southeastern Oregon; common. 



C. semiscaher (Cope). Rocky Mountain bullhead. Length 100 

 mm. ; head 3 ; depth 4.5 ; color gray, with inconspicuous cross bars on the 

 sides; rays of dorsal fins VIII, 17 or 18; anal 12 or 13: New Mexico and 

 Wyoming into Montana and Washington; common. 



Fig. 63. — Coitus bairdi (from Fishes of Illinois) . 



C. bairdi Girard. Miller's thumb (Fig. 63). Length 150 mm.; 

 head ^.^; depth 4 to 6; color olivaceous, bared or speckled with darker; 

 rays of dorsal fins VI to VIII, 16 or 17; anal about 12: middle or north- 

 ern States from New York to the Dakotas; southward along the 

 AUeghenies to Alabama; very common in clear brooks and lakes; very 

 variable. 



C. ricei (Nelson). Length 6o mm.; head 3.6; depth 5.3; color 

 olivaceous; finely speckled; rays of dorsal fin VIII, 17; anal 12: Great 

 Lakes; in deep water only. 



C. klamathensis Gilbert. Length 130 mm.; head 3; depth 4 to 4.3; 

 color brownish olive, much blotched with darker; rays of dorsal fin VII, 

 19; anal 14; the 2 dorsal fins broadly joined; lateral line very incom- 

 plete; preopercle with a single short spine: Klamath Lakes, Oregon; 

 very common. 



C. beldingii Eigenmann. Length 100 mm.; head 4; depth 5; color 

 mottled black and white, with 6 blackish cross bars on the back, the 

 first across the head behind the eyes; rays of dorsal fin VI to VIII, 15 to 

 18; anal 11 to 13: abundant east of the Cascades, Columbia River basin. 



