nsHEs 127 



scales 10-82-18; bill membranes broadly united across the isthmus: 

 upper Tennessee River basin; rare. 



H. aurantiacus (Cope). Length 150 mm.; head 4.25; depth 6; color 

 olive, with a row of confluent blotches along the side; chin and throat 

 deep orange; rays of dorsal fins XV-15; anal II, 11; scales 14-100-15: 

 upper Tennessee basin. 



H. cymatotcenia (Gilbert & Meek). Length 125 mm.; head 4 to 4.25; 

 depth 5; body robust; color greenish, with fine dots and 2 pale streaks 

 along the sides; a black spot at the base of the tail fin; rays of dorsal 

 tins XII to XIV-12 to 14; anal II, 10; scales 7-64 to 70-12: western 

 Kentucky and southern Missouri. 



6. Cottogaster Putnam. Body slender; snout blunt; scales ctenoid; 

 midventral space naked anteriorly or with enlarged caducous scales; 

 lateral line continuous; premaxillaries protractile: 5 species. 



Key to the Species of Cottogaster 



ai Midventral area with more or less enlarged caducous scales. 



bi Back with 4 broad black cross bands C. uranidea. 



hi Back tessellated C. copelandi. 



ao Midventral area naked anteriorly. 



bi Cheeks and opercles usually scaly C. shumardi. 



\>2. Cheeks and opercles naked C. cheneyi. 



C. uranidea (Jordan & Gilbert). Length 50 mm.; head 3.5; depth 

 5.6; color greenish olive; back with 4 conspicuous broad black cross 

 bands and 11 dark blotches below the lateral line; cheeks mostly naked; 

 opercle scaly; rays of dorsal fins X or XI- 13; anal II, 10 or 11; scales 

 6-48 to 56-10: southern Indiana to Alabama and Arkansas, in lowland 

 streams. 



C. copelandi (Jordan). Length 75 mm.; head 3.75; depth 5.5 to 6.5; 

 color brownish olive, with a series of small black blotches along the 

 lateral line forming an interrupted lateral band; a black spot on the 

 anterior dorsal fin; cheek naked; opercle with a few scales; rays of 

 dorsal fins X to XII-io to 12; anal II, 8 or 9; scales 6-44 to 56-8: Lake 

 Champlain to Lake Huron and southwestward to Tennessee and 

 southern Missouri; abundant in central Indiana; in clear brooks. 



C. shufnardi (Girard) (Fig. 57). Length 75 mm.; head 3.4; 

 depth 5; color dark, vaguely blotched with darker, with a large black 

 spot at the base of the anterior dorsal fin; caudal and pectoral fins 

 barred; rays of dorsal fins IX to XI-13 to 15; anal II, 10 to 12; scales 

 6-48 to 60-11: Michigan and Illinois to Kentucky and Arkansas; 

 the Great Lakes; common. 



