Family XVI. Centrarchid^;. 191 



maxillary bone; body oblong, depth 2% to 2]/^. page 



in length; scales small, 42 to 50 in lateral series . . . cyanellus 191 

 aa. Opercle not composed of well differentiated 

 osseous and membranous portions, the bone 

 becoming gradually thinner posteriorly and ter- 

 minating in a flexible osseo-membranous flap; 

 flap usually considerably produced in adults, 

 sometimes exceedingly so, and entirely black, 

 or with only a very narrow pale edging; sup- 

 plementary maxillary bone very rudimentary 

 or entirely wanting, 

 b. Dorsal spines low, the longest but slightly 

 more than length of snout; gill rakers short 

 and weak; body very robust anteriorly; 

 head large ; wavy blue lines on cheeks faint or 



absent occidentalis 192 



bb. Dorsal spines higher, the largest almost equal- 

 ing or greater than snout and eye ; gill rakers 

 rather slender and firm, 

 d. Eye large, 2% to 3 in head; no dusky spot 



on posterior dorsal or anal rays haplognathus 192 



dd. Eye smaller, 3^2 to 4 in head; dorsal and 

 anal not large, blotch of dusky near base of 

 last rays pallidus 193 



Subgenus Apomotis Rafinesque. 

 179. Lepidopomus cyanellus Rafinesque. Blue-spotted Sunfish; 



Green Sunfish. 

 Lepomis cyanellus Rafinesque, Jour, de Physique, 1819, 420; Ohio 

 River: Jordan & Evermann, Bull. 47, U. S. Nat. Mus., 1898, 

 996. 

 Pomotis aquilensis Girard, Mex. Bd. Sur., 7, pi. 111, 1-8, 1858; 

 Eagle Pass, Texas: Baird & Girard, Proc. Acad. Nat. Sci. Phila., 

 1853, 388; Eagle Pass. 

 Apomotis cyanelhis Jordan, Bull. U. S. Geol. Sur., 1878, 398; Rio 



Grande at Brownsville, Texas. 

 Northeastern Mexico to the Great Lakes. 



Head 3; depth 2%; D. x, 11; A. in, 9; scales 6 or 7-42 to 50-16. 

 Body rather elongate, becoming deeper with age; head moderately 

 large ; mouth large ; maxillary nearly reaching vertical from middle of 

 eye, broad, with a well developed supplemental bone; lower jaw the 

 longer; opercle more or less stiffened posteriorly, its black osseous 

 portion always distinctly differentiated from the posterior fleshy, or 



