CENTRAKCHIM. LXII. . 117 



a Lower pharyngeals narrow, the teeth not paved. 

 b. Pharyngeal teeth all, or nearly all, slender and acute. 



c. Supplemental maxillary well developed: palatine teeth present; gill 



rakers comparatively stiff and strong. (Apomotis Rafinesque.) 

 d. Scales rather small, more than 40 in lateral line. 



e. D. and A. in adult, with a conspicuous black spot at base of last 

 ray. 



307. L. cyanellus (Rafinesque). GREEN SUN-FISH. Body 

 oblong, the back not elevated ; mouth large, the maxillary nearly 

 to middle of eye ; dorsal spines low, about equal to snout ; oper- 

 cular flap short, with pale margin. Green, with brassy lustre, each 

 scale with a blue spot and gilt edging ; fins largely blue, A. edged 

 with orange ; iris red ; cheeks with blue stripes. Head 3 ; depth 

 2. D. X, 11. A. Ill, 9. Lat. 1. 48. L. 7. Great Lakes to Ga. 

 and Mexico ; very abundant in small brooks, especially S. ; very 

 variable. (KVCLVOS, dark-blue.) 



ee. D. and A. without black spot. 



308. L. phenax (Cope & Jordan). Body rather deep ; mouth 

 small, the maxillary to middle of eye ; opercular spot longer than 

 eye. Plain olive green; scales 6-43-14. L. 16. N. J. (fevaf;, 

 false.) 



dd. Scales rather large, less than 40 in lateral line. 



309. L. symmetricus Forbes. Body short, deep; mouth mod- 

 erate. Dark green, sides with 10 vertical bars; dorsal in <j> with 

 black ocellus on last ray ; cheek not striped ; opercular spot higher 

 than long; spines low. Head 2f ; depth If. Scales 6-34-14. 

 L. 2-|. 111. to La., not rare ; a neat and very small species. 



cc. Supplemental maxillarj' reduced to a slight rudiment; the mouth 



small, the palatine teeth few or none. 

 d . Gill rakers stiff, not very short. (Lepomis.) 



e. Opercular flap short, little larger than eye, even in adult. 



310. L. ischyrus Jordan & Nelson. Body robust, mouth large, 

 the maxillary to middle of eye ; profile depressed above eye ; scales 

 on cheek in 6 rows ; opercular flap broad, with a broad pale edge. 

 Dusky, mottled with blue and orange ; cheeks with wide blue bands ; 

 a dark spot on D. and A. behind. Head 2| ; depth 2 J. Scales 

 5-46-14. L. 7. HI. R. ; only the type known. (tV^vpos, robust.) 



311. L. macrochirus Rafinesque. Steel-blue with bronze orange 

 spots, so arranged as to form series of vertical chain-like bars ; fins 

 with bronze and orange ; no blue stripes on cheek ; P. long, reach- 

 ing A. : gill rakers slender, 11 ; 7 rows of scales on cheeks. Head 

 3; depth 21. Scales 6-42-15. L. 5. Ohio valley, rare. (/zaK/jo'y, 

 long ; x ' l P-> pectoral.) 



ee. Opercular flap in adult becoming more or less elongate and con- 

 spicuous. 



