FISHES 67 



D. episcopa (Girard). Length 75 mm.; color dusky, with a black 

 lateral band; scales 9-37 to 41-4; teeth hooked: western Texas. 



D. nuhila (Forbes). Length 60; head 4.5; depth 4; color very dark 

 with a dark lateral band; rays of anal hn 9; scales 5-37-3; teeth hooked: 

 western Illinois to Wyoming; southward to the Ozarks; common. 



D. plumhea (Girard). Color uniform; rays of anal fin 7; scales 53 

 to 58; teeth hooked: Oklahoma, Arkansas River basin. 



10. Pimephales Rahnesque. Teeth 4-4, one or more hooked; upper 

 jaw protractile; dorsal fin over the ventrals, its first ray separated from 

 the rest by a membrane; size small: 2 species. 



P. promelas Ra,i. Fathead. Body stout; length 60 mm.; head and 

 depth 4; color olivaceous; belly yellow; a dark lateral band; dorsal fin 

 with a large black cross bar; male with a black head and with several 

 large tubercles in the spring; lateral line variable, being nearly wanting 

 or complete; rays of dorsal fin 1,7; anal 7; scales 7-47-4; body short 

 and deep: Maine to Montana, southward to Tennessee and the 



Fig. 33. - liyhorhynchus notatus (from Fishes of Illinois). 



Rio Grande; common in sluggish brooks, especially in the Missouri 

 basin. 



11. Hyborhynchus Agassiz. 'Similsir to Pimephales; body elongate; 

 lateral line complete: i species. 



H. notatus (Raf.). Blunt nose (Fig. t,^,). Length 100 mm.; head 

 4,5; depth 5; color olivaceous; sides bluish, with a dark stripe; a dark 

 spot towards the base of the dorsal tin; rays of the dorsal tin I, 8; anal 7; 

 scales 6-45-4: Quebec to Dakota, southward to Alabama and Arkansas; 

 very common in small streams west of the Alleghanies. 



12. Mylopharodon Ayres. Body elongate ; head large; teeth 2, 4-5, 

 2; mouth terminal, large; lips thickened; lateral line continuous; dorsal 

 fin behind the ventrals; size very large: i species. 



M. conocephalus (Baird & Girard). Length 900 mm.; head 3.5: 

 depth 4.6; color dark, without red; rays of dorsal fin 8; anal 8; scales 17- 

 74-7; body elongate, fusiform, compressed; caudal peduncle very 

 long: Sacramento and San Joaquin Rivers; southeastern Oregon; not 

 common. 



