FISHES 85 



24. Eric3nnba Cope. Body elongate; teeth i, 4-4, o, hooked; scales 

 large; dorsal fin above ventrals; eyes very large; dentaries, interopercles 

 and suborbitals broad and with conspicuous mucous channels: i species. 



E. huccata Cope. Length 100 mm.; head 4; depth 5; color olivaceous, 

 with silvery sides; rays of dorsal and anal fins 8; scales 5-33-3; breast 

 naked: western Pennsylvania and Michigan to western Florida and 

 Kansas; locally very common. 



25. Phenacobius Cope. Sucker-mouths. Body elongate; teeth 

 4-4; hooked; mouth small, ventral, each side of the lower hp enlarged 

 into a fleshy lobe; rays of dorsal fin 8; anal 7; isthmus very broad; size 

 small: 4 species, which look like young suckers. 



Key to the Species of Phenacobius 



ai Breast scaly P. tcretulus. 



a-i Breast scaleless. 



bi Scales in lateral line 48 to 52 P. mirabilis. 



b2 Scales in lateral line 60; eyes large, placed high. 



Ci Scales in front of dorsal fin 24 P. uranops. 



Ci Scales in front of dorsal fin 22 P. catostomiis. 



Fig. 37. — Head of Phenacobius mirabilis: a, side view; b, ventral view (from Fishes of 



Illinois). 



P. teretulus Cope. Length 85 mm.; head 4.6; depth 4.5; color pale 

 yellowish, the scales above dark-edged; snout blackish; a plumbeous 

 lateral band; scales 6-43-5 : Kanawha River, West Virginia; not common. 



P. mirabilis (Girard). (Fig. 37). Length 85 mm.; head 4.3; depth 

 4.6; color olivaceous, with a silvery lateral band and a conspicuous 

 black spot at the base of the tail fin; scales 6-43 to 51-5 : Illinois River to 

 Arkansas; basin of the Tennessee River; rather common in sandy 

 streams. 



P. uranops Cope. Length 100 mm.; head 4.75; depth 6; color pale 

 olivaceous, with a dark spot at the base of the tail fin; scales 7-60-6: 

 upper Tennessee basin; common in the river channels. 



P. catoslomus Jordan. Length 100 mm.; head 4.5; depth 5.6; color 

 olivaceous, with a silvery lateral band, dark at the base of the tail fin; 

 scales 7-60-5: Alabama River basin; common. 



26. Rhinichthys Agassiz. Body elongate; head long and slender; a 

 minute barbel on the maxillary; teeth mostly 2, 4-4, i or 2, hooked; 



