1030 Bulletin 4J^ United States National Museum. 



dd. Snc«t scarcely longer than eye; head shorter, about 4 in length. 

 e. First dorsal about as liigh as second; scales rather small. 



/. Cheeks and opercles entirely naked; sides with dusky shades. 



MACULAT'JS, 1420. 

 /'. Cheeks and opercles more or less BC3ly,the cheeks sometimes naked. 

 g. Scales small, about CO to 70; 65 to 75 pores; cliecks with small scales; 

 opercle with larger ones; line with rounded continent blotches. 



ASPEO, 1421. 

 (/</. Scales larger, 50 to 60; 50 to 55 pores. 



h. Cheeks and opercles each with some large scales. 



GUNTIIERI, 1422. 

 kh. Cheeks naked or with small embedded scales; opercles with 

 some scales. 

 i. Body not very slender, the depth 5}<^ to 5^;^ in length; pec- 

 torals shorter than bead. peltatus, 1423. 

 ii. Body very slender, the depth G to fii^ in length; pectorals 

 as long as head. onACHiT.T,, 1424. 

 ee. First dorsal lower than second; scales large, 44 to 50; head chiefly naked; 

 pectorals as long as head; sides barred with deep-blue green in male. 



ROANOKA, 1425. 

 Kbicosma (ep, springtime; Koa-fidui, to adorn): 



66. Vertebras about .'57; dorsal spines 10 to 12; male with the lower fins tuberculate in 

 spring; gill membranes separate; ventrals not widely separated; scales moderate. 

 .;'. Cheeks naked; opercles scaly ; head heavy; fins large; coloration ornate, the male 

 with much blue-black and orange. evides, 1420. 



aa. Median line of belly with a series of enlarged and spinous scales, which are persistent, at 

 least posteriorly; ventrals well separated, but the interspace usually less than width of 

 base of fin. 

 Sekraria {serra, saw): 

 k. Preopercle finely serrated; gill membranes broadly united across isthmus; scales small, 

 about 70. 

 /. Coloration of Hadropterus aspro: yellowish, with diffuse, l)lackish, lateral blotches, 

 depth 5 to 6 in length. scierus, 1427. 



Hadropterus: 

 W-. Preopercle strictly entire; gill membranes rather narrowly united; scales larger, about 

 60; body robust, deep. 

 in. Olivaceous, with dark vertical liars ; fins high; dorsal rays XII-12; depth 5 in 

 length. NIGROFASCIATDS, 1428. 



Subgenus ALVORDIUS, Girard. 

 1418, HADROPTERUS PHOXOCEPHALtS (Nelson). 



Head 3j to 4; depth 51 to 6; eye ii in head, about equal to snout. 

 D. XI or XII-12 to 14 ; A. II, 8 or 9; scales 12-80 to 85-16, 66 to 71 pores. 

 Body rather slender, compressed. Head extremely long, narrow, and 

 tapering, the snout very acuminate. Mouth large, the maxillary reach- 

 ing to the eye ; the lower jaw unusually narrow and long, scarcely 

 shorter than upper; distance between mouth and gill cleft ^ head. Gill 

 membranes somewhat connected. Cheeks, opercles, and neck with small 

 scales; breast naked ; a strong opercular spine; ventral line with small 

 caducous shields ; pectoral shorter than head ; ventrals widely separated. 

 Skull more elongate than in H. asjyro, the frontal region very narrow; 

 parietals more convex in cross section than usual in Hadropterus, no supra- 

 occipital crest; vertebr;e 19 -f 20 = 39. Pyloric coeca 2. Color yellowish 

 brown, but the lateral spots smaller and more numerous than in H. aspro, 



