FISHES 121 



the base of the anterior dorsal lin; caudal and pectoral lins barred; 

 rays of dorsal fins IX to XI- 13 to 15; anal II, 10 to 12; scales 6-48 

 to 60-11: Manitoba to Kentucky and Arkansas; the Great Lakes 

 region; common. 



10. Ulocentra Jordan. Darters. Body elongate; head short and 

 thick; scales on belly like those on the sides; premaxillaries protractile; 

 ventral fins close together: 6 species, several rare. 



U. histrio (Jordan & Gilbert). Length 50 mm.; head 4 to 4.25; 

 depth 5 to 5.5; color very dark green, with 7 light dorsal cross bars 

 usually alternating with bars beneath the lateral line; fins all barred; 

 head naked; rays of dorsal fins X-13; anal II, 7; scales 6-52-1 1 : southern 

 Indiana and Kentucky to x\rkansas; common. 



U. simotera (Cope). Length 75 mm.; head 4 to 4.6; depth 4 to 5; 

 color green; sides with dark blotches; belly yellow; dorsal fins varie- 

 gated; back spotted with red; rays of dorsal fins X-ii; anal II, 7; 

 scales 10-52-12; snout very short: western Virginia and eastern Ken- 

 tucky to Alabama; very common in clear streams. 



U. longimana (Jordan). Length 60 mm.; head 4.4; depth 5; color 

 green, with 10 small irregular spots on the sides and about 5 cross 

 blotches on the back; cheeks and breast naked; opercles scaly; rays of 

 dorsal fins X-13; anal II, 8; scales 5-44-7: Virginia; abundant in rocky 

 streams. 



U. podostemona (Jordan & Jenkins). Length 50 mm.; head 4.4; 

 depth 5.6; color yellowish green, with 7 or 8 dark spots along the sides 

 and 5 or 6 larger ones along the back; fins barred; cheeks and breast 

 naked; opercles scaly; rays of dorsal fins X-12; anal II, 8; scales 4-35-8: 

 Roanoke River; common. 



11. Doration Jordan. Similar to Boleosoma, but with an incom- 

 plete lateral line and with 2 anal spines: i species. 



D. stigmcea (Jord.). Length 60 mm.; head 4.25; depth 5; color 

 olivaceous, speckled above; sides with 8 dark green blotches below the 

 lateral line; rays of dorsal fins X to XIII-12; anal II, 7; scales 5-46 

 to 55-10; opercle and cheek scaly; lateral line incomplete: Tennessee 

 and Georgia to Arkansas and Louisiana; rather common in pine woods. 



12. Etheostoma Rafinesque. Body slender; head very blunt; 

 mouth very small, inferior; premaxillaries protractile; gill membranes 

 joined across the isthmus: i species. 



E. hlennioides Rafinesque. Green-sided darter (Fig. 58). Length 

 125 mm.; head 4.5; depth 4.75-6; color olive green; sides with about 

 8 double transverse bars and dotted with orange; second dorsal and 

 anal fins bluish green; rays of dorsal fins XII to XIV- 12 to 15; anal II, 



