76 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Girard’s types of Dionda episcopa consist of two specimens, eacli about 3J inches 
long, collected in the Pecos River by Capt. J. Pope, and bear the U. S. N. M. No. 45. 
They are still in fair condition and resemble very closely my specimens from the Comal 
Spring; in the types, however, the head is a trifle longer, the depth some greater, the 
dorsal appears to be a little farther forward, and the eye is not quite so large. 
The types of D. texensis bear ‘the U. S. N. M. No. 44, and consist of two specimens, 2 
and 2f inches long, respectively, from the Nueces River; they cannot be distinguished 
from D. episcopa. 
The type of I). argentosa is a single specimen, 2f inches long, No. 32 U. S. N. M., from 
San Felipe Creek. This specimen is in poor condition ; it does not seem to be identical 
with I). episcopa , but is a heavier, stouter species; head, 3-4- ; depth, 3|; eye, 3§; dorsal 
less anterior. 
3. Hybognathus nuchalis Ag. 
This species was found to be very abundant in certain places. The collection con- 
tains 143 specimens from the Neelies River, east of Palestine; 43 from the Trinity, at 
Magnolia Point; and 10 from Big White Oak Bayou, at Houston. 
Many of the Neelies River specimens have the lower jaw covered with small cystic 
tumors, caused by the presence of psorosperms of some species of Myxosporidia , appear- 
ing as small whitish elevations. Some of these specimens were found to be infested 
about the intestines with a trematode of some species. These parasites are now being 
studied by Dr. R. R. Gurley, of the IT. S. Fish Commission, who expects to be able to 
report upon them at no distant date. 
4. Cliola vigilax (B. and G.). 
This is one of the most widely distributed species of the family of minnows; we 
found it in abundance at each of the following places: Neelies' River, 14 miles east of 
Palestine; Trinity River, at Magnolia Point; Long Lake near Magnolia Point, Hunter 
Creek, Big White Oak Bayou, and Buffalo Bayou near Houston; San Marcos River, 
San Marcos; and Guadalupe River, near New Braunfels. 
These specimens do not differ apparently from more northern specimens. The 
individuals from the vicinity of Houston are unusually large. 
5. Notropis cayuga atrocaudalis, var. nov. 
Head, 4f ; depth, 4f ; eye, 34, a little greater than snout; D. I, 8; A. I, 7; scales, 
7-36-4, about 13 before dorsal ; teeth, 4-4, strongly hooked, grinding surface developed. 
Body moderately elongate, not much compressed, back little elevated; head short 
and bluntly conic, snout shorter than eye; caudal peduncle short and deep; origin of 
dorsal slightly behind ventrals, nearer caudal peduncle than snout; anal small, its 
longest rays shorter than head ; lateral line complete. 
Color in alcohol : Above olivaceous, profusely covered with fine brownish punctu- 
lations, thickest around border of scales, not crosshatched ; side with a black baud 
half width of eye, following direction of lateral line and ending in a black spot at base 
of caudal; this band also extends across cheek through eye and around snout; top of 
head dark, snout above the black band pale; lower half of head pale, opercles silvery. 
The 17 specimens upon which this description is based were obtained in the 
Neelies River, east of Palestine, Texas, November 24, 1891. They very closely resemble 
N. cayuga Meek, but I hesitate to identify them with that species on account of the 
somewhat longer snout and the complete lateral line. 
