82 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
ingventrals; yen trals short, scarcely reaching anal; caudal long and deeply forked. 
Scales rather small and closely imbricated, very small and crowded before the dorsal; 
lateral line complete, greatly decurved, as in Notemigonus. 
Color in spirits: Pale yellowish above, silvery below; upper half of body sprinkled 
over with numerous small, dark-colored spots, thick enough along median line of 
back to form a narrow dark vertebral band from occiput to base of caudal fin ; the 
spots on anterior part of side so arranged as to form about sixteen obtuse angles fitting 
into each other, the angles opening forward, thus >>, these markings being upon 
alternate scales; a silvery band on caudal peduncle overlaid with fine dark specks; 
top of head dark, snout pale, but with many fine punctulations ; tip of lower jaw with 
some small specks; sides of head silvery; all the fins except the pectorals with many 
fine dark points, most numerous on dorsal and caudal. This curious species of No- 
tropis bears a very close superficial resemblance to Notemigonus chrysoleucus , but of 
course its generic relationship is with the Notropes. 
This species is based upon the following specimens : Three specimens, 2 to 2£ 
inches long, from Neelies River, 14 miles east of Palestine, Texas, November 24, 1891, 
and 3 specimens of about the same size, from Sims Bayou, near Houston, Texas, 
November 18, 1891. The specimens from Sims Bayou, like all other fishes from that 
place, are very much bleached, but show the same general pattern of coloration as 
those from the Neches River. 
15. Phenacobius mirabilis (Girard). 
Exoglossum mirabile Girard, Proc. Acad. Nat. Sci. Phila. 1856, 191 (Arkansas River, Fort Smith). 
Two specimens from the Trinity River at Magnolia Point, near Palestine. Also 
taken by Drs. Jordan and Gilbert in the Sabine River at Longview, Texas, and the 
Arkansas River near Fort Smith. 
16. Hybopsis aestivalis marconis J. and G. (PI. xxxv.) 
Hybopsis aestivalis marconis Jordan and Gilbert, Proc. U. S. N. M. 1886, 22 (San Marcos River). 
Head, 41, ; depth, 54; eye, 34, less than snout, but equal to interorbital width. 
We found this fish very abundant in the San Marcos River below San Marcos, 
and in the Guadalupe River near New Braunfels. It seems to be like Hybopsis hyos- 
tomus, a fish of the rapid, open stream, as we found it only where the water was pure 
and clear and the current very swift. At a single haul with a 12-foot seine in the 
Guadalupe River, between the two bridges near New Braunfels, several hundred fine 
specimens were taken. 
17. Opsopceodus osculus, sp. nov. 
I refer to this species specimens from the following places : 
Neches River east of Palestine, Texas, November 24, 1891 20 
Long Lake, Palestine, Texas, November 25, 1891 2 
Buffalo Bayou, Houston, Texas, November 16, 1891 4 
Kilper’s Ponds, Houston, Texas, November 21, 1891 4 
Sims Bayou, Houston, Texas, November 18, 1891 48 
Dickinson Bayou, Nicholstone, Texas, November 14, 1891 4 
Head, 4£ to 4§; depth, 4^ to 5; eye, 3; D. I, 10; A. I, 8; scales, 6 or 7-38 to 41-3 
or 4; teeth, 4-4 or 4-5, more or less serrate and hooked, the pharyngeals small and 
weak; peritoneum silvery, with small brown specks. 
Body rati 
length, snout 
ler slender, little elevated, head subconic, its depth at eye but half its 
blunt, shorter than eye; mouth very small, almost vertical, scarcely any 
