]S70.] ^^^ [Cope. 



Mouth slightly oblique downward, mandible included ; isthmus medium. 

 Fins D. I. 8, A. I. 8 ; the osseous dorsal ray separated from the first 

 cartaliginous by a narrow membrane, and originating above the ventrals. 

 Posterior ray 3-5 length of the anterior. 



Length 31.3 lines ; of caudal 5.8 lines ; to basis dorsal 12.9 hues. 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. 



G K o u p D . 



Teeth 4.1 — 1.4 ; lateral line little decurved ; scales •^■'' muzzle short ob- 



3 



tuse ; interorbital region wider ; depth 5; head 4 times in length. A. I. 8. 



H. CHLOROCEPHALUS. 



Teeth 4.2 — 2.4: lateral line much decurved; scales 'l!::!; muzzle acumi- 



2 



nate, interorbital space narrower ; depth 5.5, head 4 times in length. 



A. I. 8. H. CHILITICUS. 



47. Hybopsis chlobocephalus, Cope. 



Spec. nov. 



This small species is rather stout and has a deep caudal peduncle. The 

 head is broad with lai'ge orbit, descending muzzle, and descending mouth, 

 orbit in head three times, diameter exceeding lengtli 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 modei-ately decurved. Dorsal fin 

 above venti-als, 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 iu 

 a basal caudal spot. Fins unspotted, in life a metallic green liiie on the 

 vertebral line, and one from the upper angle of each oj)erculum 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. 1. 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. S.— VOL. XI. — 3")e 



