242 FISHES. 



pale margin entirely surrounding the black ; cheeks with 

 wide blue bands; lower jaw, etc., dull leaden blue; belly 

 and lower fins chiefly orange. Illinois River. 



8. L. obscurus, (Agassiz) Jor. BLUE-MOUTHED SUN 

 FISH. A heavily-built, dark-colored species, chiefly blue 

 and coppery red in life; no blue stripes on cheek; lower 

 jaw dark leaden blue; opercular spot large, without dis- 

 tinct pale margin. Cumberland and Tennessee Rivers. 



7. XENO TIS, Jordan. LONG - EAKED Sin* FISHES. 



1. X. megaloiis, (Raf.) Jor. BLUE AND ORANGE SUN 

 FISH. SUN PERCH. Brilliant, blue and orange, back 

 chiefly blue, belly entirely orange, the orange forming 

 irregular, longitudinal rows of spots, the blue in wavy 

 vertical lines along the edges of the scales; fins with the 

 rays blue and the membranes orange; ventral and anal 

 shaded with dusky blue, appearing blackish when folded; 



flap very large, with a broad pale edge which is pink 

 behind, and bluish in front; lips blue; cheeks with bright 

 blue and orange stripes; top of head and neck blackish; 

 eyes bright red; spines very low, lower than in any other 

 species of this genus; the longest dorsal spine shorter than 

 from snout to middle of eye; occiput depressed ; profile 

 high and strongly curved; depth more than half length; 

 head with flap, a little less; eye 1 in flap; pectorals not 

 reaching vent; lat. 1. 40. Great Lakes and Upper Mis- 

 sissippi River. A brilliantly colored species. (P. nitidus, 

 Kirt.) 



2. X. sanguinolentus, (Ag.) Jor. BLOODY SUN FISH. 

 Similar, but rather more elongate; the spines notably 

 higher and the blue cross-bars much more distinct. Ten- 

 nessee and South, perhaps a variety. 



