PEOCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 239 



This species is described from tliree examples taken at the Falls of 

 tlie Ohio. Two of these are now in my own collection ; the third in the 

 U. S. J^ational Musenm is nnmbered 23462. 



This species is larger than the others of the genus except C. higuttatus 

 and the Californian C. symmetricm, (Grd.). In coloration it differs 

 widely from G. higuttatus, whicli species is wholly destitute of silvery 

 lustre. Its head is likewise shorter and blunter, and the mouth smaller. 

 The form of the body very different. From C. amhlops, C. rubrifrons, 

 etc., it differs in the number of teeth and in the smaller scales. 



7. LuxiLUS zoNiSTius, sp. nov. 



{Codoma eurystoma Jordan & Brayton, Bull. U. S. Nat. Mus. xii, 42, 52; not 

 Fhotogenis eimjslomus Jordan, Ami. Lye. Nat. Hist. N. Y., 356, 1877.) 



Allied to Luxilus coccogenis, Cope. Body rather stout, compressed, 

 the back elevated at the base of the dorsal fin, thence rapidly declined, 

 the caudal peduncle rather short and slender. Head short and rather 

 thick 5 interorbital space broad and tlat; cheeks nearly vertical. Length 

 of head about equal to greatest depth of body, about 4 times in length 

 to base of caudal. Eye large, longer than snout, about 3 in head, its 

 diameter about equal to the interorbital space. Mouth comparatively 

 large, oblique; in size intermediate between L. coccogenis and L. cornu- 

 tus. Jaws about equal in the closed mouth. Premaxillary on the level 

 of the pupil ; maxillary reaching to opposite the front of the eye. Pre- 

 orbital short and deep ; suborbitals narrow. 



Scales large, G-43-3, closely imbricated on the sides of the body where 

 they are much higher than long. Lateral line strongly decurved. 



Fins moderate. Dorsal fin inserted somewhat behind the line of the 

 ventrals, I, 8, not much elevated. Anal longer than in the related 

 species, 1, 10. Pectorals scarcely reaching ventrals; the ventrals reach- 

 ing past the vent. 



Teeth 2, 4-4, 2, hooked, with narrow grinding surface. 



Color steel-blue above; sides somewhat silvery; dorsal fin with a 

 conspicuous jet black cross-bar about half way up ; a distinct round 

 black spot at base of caudal, rather smaller than the eye, behind this 

 a cream-colored area, a curved black bar at the shoulder behind and 

 above the opercle ; top of head and base of pectorals with dusky ]>unc- 

 tulatioua. Females and young specimens have these dark markings ob- 

 scure. Males in spring have the dorsal cross-bar scarlet and more or 

 less dull ferruginous ; red on the head and caudal fin. The snout is 

 covered with small tubercles in spring. 



The types of this species, about 20 in number, ranging from 2 to 4J 

 inches in length, were taken in Suwannee Creek, a tributary of the 

 Chattahoochee Eiver in Northern Georgia. 



A few young specimens of this species were mixed with the types of 

 "P/«ofo</eni6'" eurijstomus, Jor., a species which the present one somewhat 

 resembles. The specimens referred to by Jordan and Brayton (1. c.) as 

 Codoma eurystoma are the types of the present species. Fhotogenis leu- 



