FISHES 79 



with belly and lins red; a conspicuous violet crescent behind the 

 shoulder; females plain greenish; scales 6-35-3 o^* 45 back arched; 

 body compressed: southern Illinois to Dakota; southward to the Rio 

 Grande; very common in clear brooks southward. 



N. bubalinus (B. & G.)- Length 85; head 4.1; depth 3; color plain; 

 rays of anal fin 9; scales 32 to 35: Arkansas and westward; 

 not common. 



A'^. illecehrosiis (Gir.). Length 75 mm.; head 4.3; depth 4; straw- 

 color with a broad silvery lateral band; eyes very large; scales 5-35-3; 

 teeth I, 4-4, i: Lake Erie basin and Ohio River to Arkansas and 

 Missouri. 



N. macrostomus (Gir.). Head 4; depth 4.1; color brownish; sides 

 silvery; teeth i, 4-4, i; rays of anal fin 9; scales 36: Kansas to the Rio 

 Grande. 



N. texanus (Gir.). Length 50 mm.; head 4; depth 4.5; color silvery, 

 with dark points along the lateral line and a small black caudal spot; 

 scales 5-35-4: from the Trinity to the Salado Rivers, Texas. 



N. notakis (Gir.). Head 4; depth 3.6; color plain, with a black 

 caudal spot; scales 5-35-3; dorsal fin behind ventrals; body stoutish: 

 Texas from Austin westward. 



N. stigmakirus (Jord.). Spotted tail. Length no mm.; head 4.5; 

 depth 4.75; color pale olive with a large black spot at the base of the 

 tail fin; scales 7-42 to 44-3, 20 before the dorsal fin; body elongate; a 

 large blotch on the dorsal fin: Alabama basin; very common. 



N. cercostigma (Cope). Like N. stigmaturus except that there 

 are 37 to 39 scales in the lateral line: sandy streams tributary to the 

 Gulf, from the Pearl to the Nueces Rivers; abundant. ^ 



N. trichroistius (Jordan & Gilbert). Length 85 mm.; head 4.1; 

 depth 4.25; color steel blue above; sides white, with a large black spot 

 at the base of the tail fin; dorsal fin red with white tips and a broad 

 dusky band at its base; belly and lower fins white; scales 6-42-3: 

 Alabama basin; common. 



N. callistius (Jord.). Length 100 mm.; head 4.2; depth 4.6; color 

 very dark blue; sides silvery violet, with a reddish lateral band; belly 

 and lower fins white; dorsal and caudal fins red, with a white tip; 

 caudal spot present; scales 5-40-3 : Alabama basin. 



N. eurystomus (Jord.). Length 100 mm.; head 4.25; depth 4.3; 

 color olivaceous; sides silvery, with a black caudal spot; belly and lower 

 fins white; scales 6-39-3 • basin of the Chattahoochee River. 



N. cceruleus (Jord.). Length 75 mm.; head 4.3; depth 4.6; color 

 steel blue; sides and belly white, with a lateral blue-green band and a 



