338 
BULLETIN OF THE BUREAU OF FISHERIES 
dorsal, but persisting entirely on underside before the vent; ventrals apparent, 
placed well forward, about 4 myomeres before origin of dorsal; caudal large and 
deeply forked. The young fish has most of the characters of the adult at this stage. 
Body elongate; snout short and somewhat pointed; eye large; mouth oblique, reach- 
ing to front of eye. 
Pigmentation. — Chromatophores appear on both jaws, over top of head, and in 
an irregular double dorsal series to caudal, most prominent at base of dorsal and near 
caudal. A few occur on cheeks and on lateral line in a single series, linear-shaped, 
becoming larger toward caudal. On sides of stomach before ventrals, there are 
about 10 at wide intervals on ventral margin before vent, and a conspicuous double 
series on ventral line from vent to caudal. Subsurface chromatophores are evident 
on brain, gills, isthmus, over 2-chambered air bladder, covering dorsal surface of 
notochord, and a group at extreme end of body forming a subsurface caudal spot. 
The fins are colorless except for the caudal. 
BREEDING 
Our records show that hatching occurred from the middle of June until after the 
middle of August. 
22. Notropis rubrifrons (Cope). Rosy-faced minnow. 
RECORD OF CAPTURE 
This minnow is not common in the Lake Erie region. Specimens have been 
recorded from Lake Erie but the species is limited mostly to several of the larger 
streams where there is a strong current. 
DESCRIPTION 
The rosy-faced minnow is distinguished by its comparatively thick heavy body 
and pronounced sharp snout. 
15 .0-millimeter stage .- — Total length, 15.0; standard length, 12.0; length to vent, 
8.0; length of head, 3.2; snout, 0.75; diameter of eye, 1.1; greatest depth before vent, 
2.6; depth behind vent, 1.6; length to dorsal, 6.8; to anal, 8.25 millimeters. Myo- 
meres, 22 to vent plus 17 behind. Dorsal II (rudimentary), 8, origin at about 
middle of body; anal II (rudimentary), 10; caudal moderate. Body moderately 
stout; head rather large, snout long and pointed; eye large; mouth oblique, maxilla, 
reaching to front of eye. 
