[ordan and Ever7nanti. — Fishes of North Aftiertca. 289 



472. NOTROPIS XENOCEPHALUS (Jordau). 



Head 4! ; depth 5 ; eye very large, 2f in head. D. 8; A. 7; scales 5-38-3 ; 

 teeth 2, -1-4, 2. Body rather short and deep, with thick caudal peduncle ; 

 back wide, not elevated. Head large, flattish and broad above, the snout 

 rounded ; mouth large, oblique, the jaws nearly equal. Lateral lino some- 

 what decurved; 13 scales in front of dorsal; dorsal slightly behind ven- 

 trals. Dark olivaceous above, the scales being extensively dark-edged, 

 so as to give a checkered appearance ; a dark band along sides of caudal 

 peduncle, which A-anishes in black points along sides of body, reappear- 

 ing on the head and passing around the snout ; a dusky blotch at base of 

 caudal; males without red markings, the snout swollen and tuberculate 

 in the spring. Length 2f inches. Georgia to Mississippi ; common in 

 streams of the pine woods, descending to brackish water ; abundant in 

 Perdido 15ay. {^alvu, to scratch ; Ke(palt], head, from the tuberculate male.) 



Hyhopsis .nnwccphaUis, Jordan, Anu. Lye. Nat. Hist. N. Y., 187G, 334, Etowah River, etc., 



Rome, Georgia. (Type, No. 20116. Coll. Jordan .& Gilbert.) 

 Minnilus xxnocephalus, Jordan & Gilbert, Synopsis, 192, 1883. 



Subgenus ORCELLA, Jordan A- Evermann. 



473. NOTROPIS ORCA, Woolman. 



Head 41; depth 5; eye 4, small, slightly shorter than snout. D. 7; A. 8; 

 scales 8-42-4. Teeth, 2,4-4, 2, strongly hooked, with little or no grind- 

 ing surface. Body plump, little compressed, with broad back and belly; 

 dorsal outline somewhat elevated; head heavy, snout blunt, decurved; 

 mouth subinferior, little oblique, lower jaw slightly included ; maxillary 

 scarcely reaching vertical of pupil. No barbel. Top of head unusually 

 high and transversely rounded so that the eye is as near the lower as to 

 the upper profile of head ; interorbital space very wide and very convex, 

 equal to distance from tip of snout to pupil. Fins moderate, origin 

 of dorsal a little nearer snout than base of caudal, slightly behind inser- 

 tion of ventrals ; dorsal falcate, its first rays longest, li in length of head: 

 its last rays less than half length of first ; anal not so high, its longest 

 rays li in head, and about twice as long as its last ray ; margin concave; 

 pectorals slightly falcate, about reaching ventrals, li in head; ventrals 

 short, 2 in head, not reaching vent; caudal very deeply forked, the mid- 

 dle rays 2h in longest lateral ones, which are as long as head. Scales 

 rather large, thin, lateral line somewhat decurved. Color in spirits jiale ; 

 side with a broad, distinct silvery band, as broad as length of snout, bor- 

 dered above by a narrow plumbeous line ; back sparsely covered with fine 

 dark punctulations, median line of back with a faint plumbeous band; 

 top of head darkish, rest of head silvery; under part pale; fins pale. 

 Length 3^ inches. Rio Grande at El Paso, Texas; several specimens. A 

 curious species, little related to any other, {orca, the great killer, from 

 a slight resemblance in form of head to that of a dolphin.) 



Noiropis orca, Woolman, Bull. U.S. Fish Comm., xiv, 1894, (May 3, 1894), ,■>(;, Rio Grande, El 

 Paso, Texas. (Coll. Woolman & Cox.) 



F. N. A. 20 



