GILBERT: FISHES OF THE SUBGENUS LUXILUS


on the average, with long, moderately fast riffles and short, shallow
pools. The temperature of the water was 70F., and air 750F., at
12:30 p.m.


Map 3.


 "The nest was located near the head of a riffle in moderately swift
water 18 inches deep, about 20 feet from the bank .... A large
male Notropis cerasinus was observed at the head of the nest .
Other male cerasinus soon moved in over the nest and established
territories. They darted nervously about, attempting to drive away
the smaller males of Chrosomus, which were well established over
the nest .... On the other hand, cerasinus males did not often clash
with male gardens, which were conspicuous just over them. .
Female cerasinus occasionally appeared about the periphery of the
nest, but spawning was not seen. The behavior over the nest was in
general much like that of a related species, Notropis cornutus, as
reported by Raney (1940a: 8)."
 Actual spawning had not yet taken place when the observations
ended. From all indications the spawning act probably is similar to
that of N. cornutus.


1964