1870.] 461 
(Cope. 
Mouth slightly oblique downward, mandible included ; isthmus medium. 
Fins D. I. 8, A. I. 8; the osseous dorsal ray separated from the first 
cartilaginous by a narrow membrane, and originating above the ventyrals. 
Posterior ray 3-5 length of the anterior. 
Length 81.3 lines ; of caudal 5.8 lines; to basis dorsal 12.9 lines. -From 
basis to apex pectorals 4.1 lines ; same to basis ventrals 13. 1. 
Color in life very pale, sides and below silvery; a blackish spot at basis 
caudal, and a large dark spot at upper posterior part of dorsal fin. 
Common in the upper waters of the Catawba River, North Carolina. 
Group D. 
(5)-6 
Teeth 4.1—1.4; lateral line little decurved ; scales 39; muzzle short ob- 
3 
tuse ; interorbital region wider ; depth 5; head 4 times in length. A. I. 8. 
H. CHLOROCEPHALUS. 
7 
Teeth 4.2—2.4; lateral line much decurved ; scales 34-7; muzzle acumi- 
: 2 
nate; interorbital space narrower; depth 5.5, head 4 times in length. 
A. I. 8. H. cHILITICUS. 
47. HYBOPSIS CHLOROCEPHALUS, Cope. 
Spec. nov. 
This small species is rather stout and has a deep caudal peduncle. The 
head is broad with large orbit, descending muzzle, and descending mouth, 
orbit in head three times, diameter exceeding length of muzzle. End of 
maxillary extending beyond line of orbit; premaxillary margin barely 
reaching plane of lower margin of pupil. Interorbital width much more 
than length of muzzle. Lateral line moderately decurved. Dorsal fin 
above ventrals, elevated : R. I. 8, A. I. 8. : 
Length (total) 27 lines ; to origin dorsal 11.9 lines ; to basis caudal 21.6 
lines. Everywhere, except on belly and below orbits thickly dusted 
with blackish, especially gathered into a lateral band which terminates in 
a basal caudal spot. Fins unspotted, in life a metallic green line on the 
vertebral line, and one from the upper angle of each operculum to caudal, 
visible in several lights; below the latter, dark crimson; dorsal and 
caudal fins, operculum and cheek with end of nose, all crimson. Part of 
operculum, properculum, postfrontal region and top of head metallic 
green. : : 
This surpassingly beautiful fish is abundant in the clear waters which 
it inhabits, viz.: the tributaries of the Catawba River. 
This species may be compared with H. rubricroceus and H. plum- 
beolus as its nearest allies. The former has a relatively larger head, and 
more slender caudal peduncle, A. I. 9, The latter is much shorter and 
deeper fish ; its depth enters the length 4.6 times ; the eyes the head only 
2.75 times. 
A. P. 8.—VOL. XI.—30E 
