5G 
BULLETIN OF THE UNITED STATES FISH COMMISSION 
CLASSIFIED LIST OF THE SPECIES OBTAINED. 
Order Nematognatbi. 
Family Siluridiv. 
lotaliu'us pimcratus. Eio Graude. 
Anieinrus diigesi. Eio Lerma. 
Leptoj)S olivaris. Eio Grande. 
Order Eveutognathi. 
Family Catostomidse. 
Moxostoma oongestum. Eio Graude. 
Mosostoma austrinnm. Eio Lerma. 
Family Cyprinidte. 
Notropis latrensis. Eio Couebos. 
Notroj^is aztecns. City of Mexico. 
Notropis ornatus. Eio Couebos. 
Notropis cbibuahTia. Eio Couebos. 
Notropis orca. Eio Graude. 
Leuciscus uigresceus. Eio Couebos. 
Campostoma oruatnm. Eio Lerma; 
Eio Couebos. 
Couesius adustu.s. Eio Couebos. 
Hybopsis altus. Eio Lerma. 
Hybopsis aestivalis. Eio Graude. 
Pimepbales promelas coiifertus. Rio 
Couebos. 
Algausea dugesi. Rio Lerma. 
Order Eveutoguatbi — Continued. 
Family Cypriuid;e^ — Continued. 
Evarra eigenmanui. Canals, City of Mex- 
ico. 
Hybognatbus melanops. Rio Couebos. 
Family Cbaraciuidie. 
Tetragouopterus argentatiis. Rio Couebos. 
Order Haplomi. 
Family CypriuodontidiB. 
Gambusia uobilis. Rio Couebos. 
Gambusia infaus. Rio Lerma. 
Pseiidoxipbojjborus bimaculatus. Ori- 
zaba. 
Cypriuodou eximius. Rio Couebos. 
Cypriuodou elegaus. Rio Couebos. 
Cbaracodou variatus. Rio Lerma. 
Order Percesoces. 
Faiuily Atberinidie. 
Cbirostoma jordaui. City of Mexico and 
Rio Lerma. 
Order Acautbopteri. 
Family Percidse. 
Etbeostoma micropterus. Rio Couebos. 
Etbeostoma australe. Rio Couebos. 
RIO GRANDE AT EL PASO DEL NORTE. 
The Eio Graude was examined above the waterworks at El Paso. At this place 
there is a shallow ripple, but tlie bed of the stream is so rocky that a seine is handled 
with difficulty. Comparatively few species were taken, though the ripple was quite 
thoroughly seined. Following is a list of the species obtained: 
1. Ictalurus punctatus (Raflnesqne). Channel Cai. Very abnudaut ; twenty or more siiecimeus taken, 
averaging 10 inches in length. 
2. Leptops olivaris (Rafiuesque). Flathead ox: Mud Cal. Not common; only a few specimens taken. 
3. Moxostoma congestura (Baird & Girard). Abundant. 
4. Notropis orca, sp. uov. Teeth 2, 4-4, 2, strongly booked. Head, 44; depth, 5; eye, 4, small, slightly 
shorter than snout; D. i, 7; A'. T,'g; scales, Body plump, little compressed, with 
broad back and belly ; dorsal outline somewbat”elevated ; bead heavy, snout blunt, decitrved ; 
mouth subinferior, little oblirpie, lower jaw slightly included; maxillary scarcely reaching 
vertical of pupil; top of bead unusually high and transversely rounded, so that the eye is 
as near to the lower as to the upper profile of the bead. Interorbital space very wide and 
very convex, e(pial to the distance from tip of snout to pupil. Fins moderate; origin of 
dorsal a little nearer snout than base of caudal, slightly behind insertion of ventrals ; dorsal 
high, falcate, its first rays longest, 14 in length of bead, its last rays less than half length 
of first; anal not so high, its longest rays 14 in bead and about twice as long as its last ray; 
margin concave; pectorals slightly falcate, almost reaching ventrals, 14 in bead; veutrals 
short, 2 in bead, not reaching vent; caudal very deeply forked, the middle rays 24 in longest 
lateral ones, which are as long as bead. Scales rather large, thin; lateral line somewhat 
decurved. Color, in spirits, jiale; sides with a broad silvery baud, as broad as length of 
snout, bordered above by a narrow plumbeous line; back sparsely covered with fine dark 
pnuctulations, median line of back with a faint plumbeous band; top of bead darkish, rest 
of bead silvery ; under parts ])ale ; fins pale. Length, 34 inches. Eio Grande, at El Paso, Tex. 
5. Hybopsi.s aestivalis (Girard.) Typical example ; the species was originally described from the 
Eio Grande basin. 
