16 
BULLETIN OP THE UNITED STATES FISH COMMISSION. 
Salvelinus fontinalis (Mitchill). 
This species does well, growiug faster thau the uative trout. It seems to prefei 
the colder waters of the upper lake. 
Salmo irideus Gibbons. 
This species is doiug well, aud is already becomiug common. 
Salmo salar sebago (Girard). 
The land locked salmon was introduced about 1885. They grow very slowly in 
the Twin Lakes, aud rarely exceed one-half iiouud. They are occasionally taken. 
ARKANSAS KIVEK, BELOW THE CANON. 
1. Ameiiirus melas (Katinesqne). P. 
liather scarce. 
2. Catostomus teres (sucklii Girard). A., P. 
Everywhere common. 
3. Campostoma anomalum (Eafinesquej. A. 
Scarce. Campostoma aikeni Cope, from Pueblo, is identical with C. anomalum. 
4. Pimephales promelas confertiis (Girard). A., P., C., F. 
Very common in muddy shallows. 
5. Notropis scylla (Cope). P. 
In the river channel. Not common. This is the species recorded by Dr. Gilbert 
from Kansas as Notropis deliciosus lineolatus. Notropis chlorus (Jordan) is probably 
the same species. Agassiz’s lineolatus may be this or some of the related species. 
The short description is insufticieut to permit iudentification, and the name should 
not be used.. The same remarks apply also to Ealinesque’s name microstomus, which 
I have elsewhere used iustead of stramineus and the still older name deliciosus. No- 
tropis plienacohius Forbes is identical with N. scylla, as I am informed by Dr. Gilbert, 
who has examined Dr. Forbes’s types. N. scylla is close to N. deliciosus, but stouter in 
body with a shorter, blunter, aud deeper head. Its scales are larger, but those before 
the dorsal are smaller and more crowded. Moutb small with subequal jaws, the cleft 
somewhat oblique. Head 3§-4^ ; depth 4-4J; scale;? 31-33; 14-15 before dorsal ; max- 
illary equal to eye, 3i-3J in head ; snout 4. Pectoral nearly reaching ventral. Color 
pale, a dusky shade before dorsal and one on each side of the flu, as in N. deliciosus ; 
some dark dots on side of snout ; a faint dark lateral shade. In N. deliciosus the 
scales are 34-38, 12 before dorsal ; eye, 3 in head ; body and head more slender. Ke- 
newed comparison of specimens from White Eiver, Indiana, with others from Eio Co 
mal in Texas, confirms my belief in the complete identity of N. deliciosus aud N. stro- 
mineus. 
6. Notropis liitrensis (Baird and Girard). P., F. 
Very common at Pueblo; some specimens highly colored; bodies blue, fins 
crimson. 
7. Rhinichthys dulcis (, Girard). P. 
Abundant aud large in the river and in Grape Creek. Fins often red. 
