54 VERTEBRATE ANIMALS OF THE UNITED STATES 



Ci Lips thin and white. 



di Snout very blunt, the nostrils being near the tip C. dijfformis. 



d2 Head small and pointed C. thompsoni. 



Co Lips thick and reddish in color C. velifer. 



a2 On the Atlantic slope C. cyprinus. 



C. carpio (Raf.). Carp sucker. Extreme length 900 mm.; extreme 

 weight 10 lbs.; head 4 to 5; depth 3; color silvery gray; rays of dorsal 

 hn 30; anal 7; scales 36; lips thin: Ohio Valley, southwestvvard to 

 central Texas; abundant. 



C. difformis Cope. Length 300 mm.; head 4.5; depth 2.5; color 

 silvery; snout very blunt; rays of dorsal fin 24, the anterior rays greatly 







Fig. 26. — Carpiodes cyprinus {from Jordan i^ Evermann). 



elongated; anal 8; scales 6-35-6; dorsal fin very high: Ohio Valley 

 and westwards; common. 



C. thompsoni Agassiz. Length 500 mm.; head 4.25; depth 2.5; 

 color silvery; rays of dorsal fin 27; anal 7; scales 7-39 to 41-6; head 

 small and pointed: basins of the Great Lakes and the St. Lawrence; 

 common. 



C. velifer (Raf.). Quillback. Length 300 mm.; head 4; depth 2.5 

 to 3; color pale; rays of dorsal fin 26 or 27, the anterior rays twice as long 

 as the others; scales 7-37 to 40-6; opercle striate; lips thick and flesh- 

 colored in life, the two halves of lower lip meeting at an acute angle* 

 Mississippi Valley and southwestward to the Rio Grande; common. 



C. cyprinus (LeSueur). Carp sucker (Fig. 26). Similar to C. 

 velifer, but with a smooth opercle; body elongate: streams entering 

 Chesapeake Bay; common. 



