ICHTHELID^E. XCII. 239 



9. /. rubricauda, Holbr. RED-TAILED BKEAM. Dusky 

 olive above, belly and vertical fins red; a bay spot at 

 the base of each scale, these forming interrupted stripes; 

 head with blue lines, especially noticeable in front of 

 eye; opercular flap long, rather wide, bordered with 

 blue; spines rather high; pectorals shorter than ventrals; 

 depth 2^ in length. Southern States, chiefly east of the 

 Alleganies. 



10. /. appendix, ( Mitch. ) Bliss. NORTHERN RED- 

 TAILED SUN FISH. Reddish brown, with rusty red 

 spots ; cheeks with blue lines ; opercular flap long, 

 rather narrow, scarcely pale-edged ; vertical fins more 

 or less bright red; spines moderately high; depth 2-^ in 

 length; pectorals as long as ventrals. Maine to North 

 Carolina, east of the Alleganies; the only Ichthelis 

 occurring in New England. 



Several other species of this genus have been described 

 within our limits, but we are unable to recognize them. 

 A rigid reduction would perhaps show the identity of 

 species 6, 7 and 8, and possibly rubricauda is a geo 

 graphical variety of appendix. 



12. POMOTIS, Rafinesque. POND FISHES. 



1. P. auriius, (L.) Giinther. COMMON SUN FISH. 

 PUMPKIN SEED. BREAM. Depth more than half length ; 

 greenish olive above, sides orange - spotted ; orange 

 yellow below; cheeks orange with blue wavy streaks; 

 ear-flap rounded, broadly edged with scarlet below and 

 behind; lower fins orange, upper orange-spotted; D. X, 

 10; A. Ill, 9; lat. 1. 37. Great Lakes and streams 

 chiefly northward and E. of the Alleganies; seldom in 

 company with Chcenobryttus. (P. maculatus, aureus, 

 vulgaris, and luna of authors.) 



