1856.] 197 



simply indicate the female sex at the breeding season. The head is of moderate 

 size, subconical, the snout generally protruding beyond the lower jaw. The 

 mouth is small, slightly oblique and subterminal.' No barbels of any sort. Eyes 

 moderate. Isthmus narrow. Tail tapering, caudal fin bifurcated. Insertion of 

 ventrals opposite or slightly in advance of the anterior margin of dorsal fin. 

 Scales of moderate development, imbricated, much higher than long. Lateral 

 line forming a downwards curve beneath the middle of the flanks. Pharyngeal 

 bones like those of Plnrgyrus. The teeth are slender and compressed, of the 

 raptatorial kind of the hooked type, slightly hooked, without grinding surface, 

 instead of which, a sharp ridge inconspicuously creaated, and disposed upon a 

 double row of four and one, in the following manner, 1 | 4 4 | 1. 



We know already several species of this genus, besides one formerly described 

 and with which we commence the list. 



1. Cyprinella bubalina. Leuciscus bubalinus, B. & G., in Marci/s Expl. of Red 

 Riv. of La. 1853, 249. Zool. PI. xiv. figs. 5 8. It is one of those species, the 

 dorsal outline of which is very much arched. 



From Otter Creek, a tributary to the northern fork of Red River, Ark. 



2. Cyprinella umbrosa. Also a deep bodied species, much larger than 

 the preceding, indeed the largest of the species hitherto known of its 

 genus. The ventral outline as much arched as that of the back. The greatest 

 depth, taken at the anterior margin of the dorsal, is equal to the third of the 

 length, the caudal fin excluded. The entire length measures about three inches 

 and a quarter, the caudal fin being a little less than the greatest depth. The 

 nape is a little depressed ; the head constitutes the fourth of the length, caudal 

 fin excluded. The eye is circular, its diameter entering a little over three times 

 in the length of side of the head. The anterior margin of the dorsal is nearer the 

 tip of the snout than the insertion of the caudal. The insertion of the ventrals 

 is a little in advance the anterior margin of the dorsal. 



D 8 4- 2 ; A 9 + 2 ; 3, 1, 9, 8, 1, 4 ; V 8 ; P 14. 



Greyish red above; greyish white beneath. Fins unicolor. 



Specimens were caught by H. B. MoUhausen, under Lt. Whipple, in Coal 

 creek, a tribatary to the southern fork of the Canadian river, Ark., and also 

 twenty miles west of the Choctaw Agency. 



3. Cyprinella gdnnisoni. The body is short but not so deep as in the pre- 

 ceding species. The head is smaller than in C. umbrosa, but the eye preserves 

 the same proportions. A characteristic feature may be found in the scales which 

 show a greater portion of their surface, though equally as high. Color reddish 

 brown, dark above and light beneath. 



Collected in Cottonwood creek, a tributary of the Great Salt Lake of Utah, 

 and brought home by Lt. E. G. Beckwith, U. S. A. 



4. Cyprinella beckwithi. A species allied to the preceding by its external 

 form and general appearance, but readily distinguished from it by a larger head, 

 and larger scales also. The latter one likewise larger than in C. umbrosa. Color 

 greyish brown above, orange red beneath ; fins unicolor. 



From the sluices of the Arkansas river near Fort Makee ; brought home by Lt. 

 E. G. Beckwith, U. S. A. 



5. Cyprinella suavis. This species establishes the transition between the 

 deep and slender species. The head forms about the fifth, and the depth the 

 fourth of the total length. Yellowish red above, and yellowish white beneath 

 with a silvery hue. 



Collected near San Antonio, Texas, by Dr. C. B. Kennerly, under Lt. A. W. 

 Whipple, U. S. A. 



6. Cyprinella LEPiDA. Elongated and fusiform; the greatest depth taken 

 upon the anterior third of the body, being contained four times and a half in the 

 total length ; the head forming a little less than the fourth of the same length. The 



