Jordan and Evermann. — Fishes of North America. 917 



(/. Opercular spot obsolete; body rather elongate, the depth 3 to 3>^ in length; 

 snout 3 in head; head 3!/( in body; second D, I, 2G; A. T, 22; shields 25 

 to 29. 

 c. Body slender, the depth about W):, in length; color dark, chiefly bluish. 



UUIiER, 1311. 

 ee. Body deeper, the dejith about 2' in length; color pale, mostly golden. 



BARTlI0L0M.T;r, 1312. 

 'i. Soft dorsal and anal ninoh elevated in front and more or less falcate; upper teeth in a 

 band, the outer enlarged; lower teeth in one series; dorsal sheath of scales not 

 greatly developed; soft dorsal and anal both rather short. 

 Tricroptehus (rpeis, three; aKpov, point; Trrepdc, fin; from the 3 free spines supposed to 

 stand between the dorsals): 

 /. Breast naked, except a small rhombic area before ventrals; two small canines in 

 front of lower jaw; body robust, compressed. 

 g. Opercular spot large; adult with a black spot on pectoral; pectoral 3 in length. 

 Head 3i^; depth about 3; second D. I, 20; A. I, 10; scutes (developed) 

 about 25. HIPPOS, 1313. 



ff. Breast entirely covered with small scales. 

 Paratractus (n-apa, near; arpaKTo;, spindle): 

 h. Body subfusiform, the depth less than % the length ; breast scaly; teeth of outer 

 seriessmall, not canine-like; a black opercular spot; no spot on pectoral; 

 arch of lateral line about half straight part. crvsos, 1314. 



1. Pectoral fin moderate, rarely longer than head; scutes about 50. 

 //. Pectoral fin very long, much longer than head; scutes about 40. 



CAnALLU.«, 1315. 

 CARANniniTHYS, {Caram-, ix^u'?, fish): 



hh. Body oblong ovate, the depth more than ^--i the length; outer teeth rather 

 strong, lower teeth not canine-like. 

 j. General color silvery; vertical fin.s not all black. 



/.-. Body moderately elevated, the depth in adult 2 to iy^ in length. 



Opercular spot very small or obsolete; no pectoral spot; pectoral 



3 in length. 



/. Body rather elongate, the depth in adult 2J^ in length; dorsal 



and caudal fins largely black; eye larger than in C lalm, the 



head less obtuse. Head zy^; second D. I, 19; A. I, 15; scutes 



30. MAROINATUS, 1316. 



U. Body moderately deep, the head bluntish, the eye small; tho 

 depth about 2J^ in length; dorsal fin scarcely dusky, caudal 

 fin pale. Head3|; second D. I, 20; A. I, 17; scutes 30. 



I. AT us, 1317. 

 W,-. Body much elevated, the depth in adult 2J in length; no dark cross 

 bands nor opercular spot; a small, dark spot in axil; caudal and 

 dorsal lobes dusky; curve of lateral line IJ^ iu straight part; 

 caudal lobes as long as liead; pectoral J longer. Head 3g; depth 

 2J; second D. I, 22; A. II, I, 19; scutes 32. medusicola, 1318. 

 ji- General color brassy or blackish; vertical fins black; lower teeth not 

 canine-like. 

 m. Anterior profile gibbous; head very large; curve of lateral line less 

 than % straight part; second dorsal and anal strongly falcate; 

 anterior lobe of dorsal about % head; pectonil very long, 2% in 

 length; color nearly uniform black. Head 3 Vj; depth 2= ; second 

 D. I, 21; A. IF, I, 18; scutes 28. luguukis, 1310, 



mm. Anterior profile scarcely gibbous; curve of lateral lino a little moro 

 than % straight part; soft dorsal and anal strongly falcate; ante- 

 rior rays of dorsal % head; pectoral a little more than J.^ I>ody; 

 color dark olivaceous or brassy ; sides with many small dark- 

 brown spots. Head 33--;i; depth 2%; second D. I, 22; A. I, 19; 

 scutes about 35. melampyqus, 1320. 



