590 [Aveust, 
maculated; the fins are unicolot except the dorsal which has a black spot at 
its posterior margin. 
D9.A8 C61. 7.6.1.5. V 6. P 14. 
Leon’s Springs, Rio Grade del Norte. 
13. CypRrinopon ar1pposus, B. and G.—The back forms a very prominent arch 
in the individuals of both sexes. The nape is often depressed and subconcave. 
The head is preportionally small, and the eyes large. The back, upper part of - 
sides, head, and dorsal fins, are uniformly bluish black in the male; beneath 
volden yellow, and the caudal margined with black; the anal, ventrals and pec- 
torals, yellow. The female exhibits vertical bars of black on the sides from 
the head to the caudal fin which is unicolor like the anal, ventrals and pectorals, 
The dorsal is provided posteriorly with a black spot. 
DAO AGI y Ceara Stay denver cde los 
Brackish waters of Indianola. 
14. Hereranpria arrinis, B. and G.—-Body elongated, subfusiform and com- 
pressed. Head forming about one-fifth of the entire length. Body yellowish 
brown above, orange beneath. Fins unicolor, except the caudal which has two 
narrow bands of black. 
D6. A8.C 3.1.7.6. 1.2. V 5. P 12. 
Rio Medina and Rio Salado. 
15. Hereranpria NoBILIs, B. and G.«-General form much stouter than in the 
preceding species; back arched. Head forming the feurth ef the entire length. 
Ground color reddish; margin of scaies black. 
ID Be Ay 6 G 4s Ils To Po Ilo Ba W By IP 1. 
From Leona and Camanche springs, valley of the Rio Grande del Norte. 
16. Hereranpria PaTRUELIS, B. and G.—Body rather elongated, compressed. 
Head stouter than in H. afinis, though forming the fifth of the entire length. 
Reddish brewn above, yellowish beneath. 
1D) ie AN (3 (G Bo Ilo Wo Bs Ilo Bs \W Gy 1P Mile 
Inhabits the Hydrographic basin of the Rio Nueces ; specimens were collected 
in the Rio Sabinal, Rio Leona and Rio Nueces, and Elm creek. 
17. HeTERANDRIA OCCIDENTALIS, B. and G.—Body slender; back slightly 
arched ; head small and conical, forming the fifth of the entire length. Reddish 
brown above; reddish yellow beneath. Fins unicolor, of a light yellowish 
white. The ventral line is marked bya black stripe. A black and heavier 
Jine may be observed under the tail, between the posterior margin of the anal 
fin and the base of the caudal. 
IDiBs AN Yo OA IG TS Csils Bs Ws 12 110; 
Collected in the Rie Santa Crux of the Rio Gila. 
Description ef New Species of Fishes, collected by Captains R. B. Marcy, and 
Geo. B. M’Cleilan, in Arkansas. 
By Seencer F. Bairp, and Cuarzes GirarD. 
1, Pomotis previcers, B. and G.—Body subelliptical, rather short ; head very 
short, fore part convex and elevated; peduncle ef tail of medium size. The 
greatest depth is more than half of the length, the caudal fin excluded. The 
origin ef the dorsal fin is in advance of the epercular flap, and is composed of 
eleven spiny rays and ten soft ones. The origin of the anal is under the first 
sott ray of the dorsal, and contains nine soft and three spiny rays. The pos- 
terior extremities of these two fins extend a little beyond the middle of the pe- 
dunele of the tail. The caudal is slightly emarginated posteriorly, and its 
angles rounded; it is composed of seventeen fully developed rays and a few ru- 
dimentary oness The ventrals inserted behind the base of pectorals, extend by 
their tips to the anus. The pectorals, composed of thirteen rays, do not reach 
guite so far. 
D XI. 10. A Ill. 9.C 2.1.8.7.1.2. VIS. P 13. 
