PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 239 



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

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

 TJ. S. National Museum is luunbered 234G2. 



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

 and the Califoruian C. symmetricus, (Grd.). In coloration it differs 

 widely from C. Mf/uttatm, which species is wholly destitute of silvery 

 lustre. Its head is likewise shorter and l)lunter, and the mouth smaller. 

 The form of the body very different. From C. amblops, C. ruhrifrons, 

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



7. LuxiLUS zoNisTius, sp. nov. 



{Codoma eun/-itoma Jordan & Brayton, Bull. U. S. Nat. Mus. xii, 42, 52; not 

 Photogcvh cnrjistomHs Jordan, Auii. Lye. Nat. Hist. N. Y., 356, 1877.) 



Allied to LuxiJuH 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 sleuder. Head short and rather 

 thick; interorbital si)ace broad and flat; 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, oblicpie; in size intermediate between L. coccogenLs and L. cornu- 

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

 of the pu]nl ; maxillary reaching to opposite the front of the eye. Pre- 

 orbital short and deep ; suborbitals narrow. 



Scales large, 0-43-3, closely imbricated on the sides of the body where 

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



Fins moderate. Dorsal tin inserted somewhat behind the liue 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 grindiug surface. 



Color steel-blue above ; sides somewhat silver}^ ; 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 ])ectorals with dusky punc- 

 tulations. 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 sjiring. 



The types of this species, about 20 in number, raugiug from 2 to 4^ 

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

 Chattahoochee lliver in Northern Georgia. 



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

 '■'- Photogenis'''' eurystamm, Jor., a species which the present one somewhat 

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

 Codoma curystoma are the types of the i)resent species. Fhotogeiiis leu- 



