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506 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 
there are 7 rays in the anal fin. In H. maculata there are about 16 scales 
in front of the dorsal, and the anal rays are I, 8. 
This species will come under Professor Jordan’s genus Chriope. (Bull. 
U.S. Geol. Surv. vol. iv, No. 4, 787.) 
GENUS LUXILUS, Rafinesque. 
34. Luxilus cornutus (Mitch.) Raf. 
Hypsilepis cornutus; Copr, Trans. Amer. Phil. Soe. 1869, 372. 
Three specimens of the young of this widely diffused species were 
obtained at Corinth, and many others at Enterprise. 
35. Luxilus chickasavensis, Hay, sp.nov. (No. 27,419.) 
This species closely resembles Codoma stigmatura, Jordan, from the 
Alabama River, originally described as Photogenis stigmaturus. (Annals 
N. Y. Lye. Nat. Hist. 1877, 337.) If Codoma is to be regarded a valid 
genus, and if Ph. stigmaturus belongs to that genus, then the present 
species will be Codoma chickasavensis. I do not, however, believe that 
there is sufficient grounds for putting Photogenis stigmaturus and Lux- 
tlus analostanus into different genera. So far as I can determine with 
the aid of a good microscope, the masticatory Surface as truly exists on 
he teeth of Ph. stegmaturus as on those of Lux. analostanus. Some- 
times in the former species one edge is serrated; and in some species of 
Codoma, as this genus is limited by Professor Jordan, occasionally both 
boundaries of the concave surface are serrated. I hope, at no distant 
period, to be able to discuss this subject still further. For the present 
T adopt the name Luvilus for both this species and Luxilus analosta- 
nus (Grd.) Jor. 
In a close comparison of the present species with Codoma stigma- 
tura, I find the following differences to exist: There are fewer scales 
along the lateral line, 58 to 40 instead of 45. The eye is also consid- 
erably larger, being contained in the head 35 times instead of 44, and 
about equal: to the snout. The caudal spot is as intensely black as in 
C. stigmatura, but considerably smaller. It is about as large as the eye, 
sometimes smaller; whereas in that species it is nearly always larger, 
being in length * usually about one-third of the head”. In this species 
it is about one-fourth of the head. Neither does it extend so far on the 
rays of the caudal fin. The form of the head and body, and the position 
and size of the fins, are apparently the same as in C. stigmatura, un- 
less it be that the body is a little deeper, the depth being contained in 
the length from 4 to 44 times. ; 
The black spot on the posterior rays of the dorsal fin is obsolete or 
wanting, while there is a narrow dark line running up on one or two of. 
the anterior dorsal rays. . 
There are, on the heads of a few of my specimens, some evidences of 
the existence of tubercles. / : 
