CENTRAECHID^. — LXII. 117 



a Lower pharj-ngeals 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 Eafinesque.) 

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

 c. 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 gUt 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, (xuai/or, dark-blue.) 



ee. D. and A. without black spot. 



308. L. phenas (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. {(fieva^, 

 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^. HI. to La., not rare ; a neat and very small species. 



cc. Supplemental maxillary reduced to a slight rudiment; the mouth 

 small, the palatine teeth few or none. 

 d. Gill rakers stiff, not verj' short. (Lepomis.) 

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



310. L. ischynis 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 2f ; depth 2|. Scales 

 5-46-14. L. 7. HI. R. ; only the type known. ((Vxvpor, 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 

 8;depth2J-. Scales 6-42-15. L. 5. Ohio valley, rare. (fiaKpos, 

 long ; x^^Ry pectoral.) 



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

 spicuous. 



