VERTEBRATE ANIMALS OF THE UNITED STATES 



XIII-14; anal II-12; scales 8-69-8 to 12; cheeks and opercles scaly: 

 northern Indiana and Illinois; rare. 



A. phoxocephalus (Nelson). Length 100 mm.; head 4; depth 5.5 to 

 6; color yellowish brown, with the lateral blotches elongate; cheek and 

 opercle scaly; rays of dorsal fins XI or XII- 12 to 14; anal II, 8 or 9; 

 scales 12-68-14; head very long and slender; a strong opercular spine; 

 pyloric caeca 2: Ohio to Iowa; southward to Tennessee and Oklahoma; 

 in sandy rivers; locally common. 



A. macrocephalus (Cope). Length 75 mm.; head 3.5 to 4; depth 6 

 or 7; color light brown, with 9 spots on the side; rays of dorsal fins 

 XV-12 to 14; anal II, 9 to 11 ; scales 11-77-15; cheek naked or with 



- - -' U 



Fig. 56. — Alvordius maciilatiis {from Jordan i^ Everniarm) . 



rudimentary scales; opercle with small cycloid scales; a small spot 

 at the base of the tail fin : west slope of the Alleghenies, from Pennsyl- 

 vania southwards; in clear rivers; scarce; not in brooks. 



A. maculatus Girard (Fig. 56). Length 100 mm.; head 4; depth 

 5 or 6; color yellowish or greenish, with about 7 elongate blotches 

 along the sides; rays of dorsal fins XIII to XV- 11 to 13 ; anal II, 8 to 10; 

 scales 9-65-17; cheek with small scales, opercle with larger ones; pyloric 

 caeca 3: Great Lakes to Manitoba; eastward and southward to the 

 James, the Ohio Valley and to Arkansas; common in clear streams; 

 common in small brooks. 



A. peltatus (Stauffer). Length 100 mm.; head 4; depth 5.6; color 

 light yellow, with 6 large, squarish lateral blotches and faint bars 

 between; cheek naked; opercle scaled above; rays of dorsal fins XII-12; 

 anal II, 8; scales 6-52 to 56-9: southeastern Pennsylvania to South 

 Carolina, in coastwise streams; locally common. 



A . ouachitcB (Jordan & Gilbert) . Length 60 mm. ; head 4 ; depth 6.5 ; 

 color olivaceous, with about 5 rather black bars extending downward 

 from the back to the lateral fine and 8 or 9 dusky quadrate lateral 

 blotches; rays of dorsal fins XI or XII-13; anal II, 10; scales 6-52 to 

 60-10: southern Indiana to Arkansas; not rare. 



