194 FIELD COLUMBIAN MUSEUM ZOOLOGY, VOL. V. 



tines; gill rakers always short .sometimes very much reduced; pectoral 

 fins always longer than head, sometimes extending past middle of anal ; 

 dorsal spines rather high; lower pharyngeal deep and broad, with 

 inferior and lateral prominences, never flattened or hollowed under- 

 neath, width in length of toothed portion about 2 in adults, inner 

 angle 95 to 111, outer margin a double curve, moderately inbent 

 posteriorly in front of spur, and more or less decidedly rounded 

 anteriorly as the margin of a lateral ledge-like prominence; teeth on 

 lower pharyngeals short and heavy, their upper surfaces very bluntly 

 rounded or paved ; red or orange on posterior portion of opercular flap 

 definitely marked off from the paler or blackish portions adjacent, 

 and not blended with them as in the preceding genus. 



183. Eupomotis heros (Baird & Girard). 



Pomotis heros Baird & Girard, Proc. Acad. Nat. Sci. Phila., 1854, 

 25; Rio Cibolo, Texas: Girard, Mex. Bd. Sur., 6, pi. n, figs. 

 1-4, 1859; Rio San Juan, Cadereita, Nuevo Leon. 



Eupomotis heros Jordan & Evermann, Bull. 47, U. S. Nat. Mus., 

 1896, 1007: Meek, Field Col. Mus. Pub. 47, 1900, 13. 



Northeastern Mexico in lowland streams, north to southern Illinois. 



Head 2-f-; depth 2\; D. x, 12; A. in, 10; scales 6-40-13. Body 

 moderately elongate, compressed; anterior profile slightly concave 

 about eyes, slightly convex at nape; head rather small; mouth small, 

 maxillary scarcely reaching vertical from anterior margin of the pupil, 

 its length equaling length of snout, 3^ m head; diameter of eye 4 in 

 head; opercular flap short, in life a red spot at its lower posterior angle, 

 the margin pale; dorsal spines strong, the last one 2% in head; pec- 

 toral fin very long, its tip reaching base of second anal ray, the fin 

 slightly longer than the head; ventral short, iK i n head; 5 rows of 

 scales on the cheeks; caudal fin emarginate. 



Color light olivaceous with silvery reflections, some of the scales 

 with darker centers forming indistinct lateral streaks along the rows 

 of scales; cheeks without blue stripes. Length about 12 inches. 



Subfamily Micropterinae. 



76. Micropterus Lace"pede. 



BLACK BASS. 



Micropterus Lace"pede, Hist. Nat. Poiss., iv, 325, 1802. (Type, 

 Micropterus dolomieu Lace"pede.) 



Body oblong, compressed, the back not much arched; head ob- 

 long, conic; mouth very large, its gape extending to near vertical from 

 posterior margin of eye ; teeth on jaws, vomer and palatines ; preopercle 



