152 REPORT OF NEW JERSEY STATE. MUSEUM. 
black blotch. Fins below yellowish-orange, dorsal and caudal 
dull olive. Length 234 inches. Budd Lake. 
The most abundant of all our small fishes in streams of fresh 
water. They are seldom found in the creeks or wider streams in 
such abundance as in the small brooks of clear water, particularly 
if rapid. ‘They also like the quiet little pools or deeper places. 
Here they may often be seen swimming persistently against the 
current, sometimes gaining a few inches or again slipping back 
perhaps further, and then darting suddenly away when disturbed, 
only to be seen, however, back again repeating the same perform- 
ance over and over. One may scoop every individual from the 
brook before they will desert a favorite place entirely. This is a 
most beautiful species and in life is found to vary considerably 
even in the same stream. I have found as many as a dozen dif- 
ferent individual variations in a single brook in the spring of the 
year. Ordinarily in life the adult male is a beautiful olivaceous- 
brown on the upper surface, each scale with defined though only 
slightly darker edges, and the whole region all specked or dotted 
with blackish. Median line of back only very slightly paler. 
Below white with silvery, showing tints of purplish and bluish 
in some lights. Jaws whitish. Opercle with green and golden 
reflections in some examples. A dusky or blackish-brown band 
laterally from snout through eye to base of caudal and also re- 
flected on bases of median rays of latter. A brassy or coppery 
line reflected along dark lateral band above, but narrow. 
Dorsal and caudal dilute brown. Pectoral golden basally, 
otherwise whitish. Ventral and anal dilute brownish-white. A 
rather common more or less russet variety has back brown and 
upper surface of head slightly tan-color. Lower surface of head 
and body white. On the back each scale has a slightly darker 
edge, though not those of lateral band. A black band encircles 
snout through iris to opercle. After this it becomes bright russet 
and continues to base of caudal, where it is with more or less 
blackish medianly. Back and lateral band also with small black 
specks or granulations, median line of back paler. Dorsal, caudal 
and anal dilute olivaceous more or less tinged with ruisset, espe- 
cially latter two fins. Pectoral deep brick-red except lower rays, 
which are white. Axil of pectoral bright red. Ventral dilute 
