330 
BULLETIN OF THE BUREAU OF FISHERIES 
large, round chromatophores are evident over stomach region and intestine. Ven- 
trals are unpigmented but other fins are marked with double series of pigment spots 
along sides of rays. The chromatophores are thicker on front of dorsal base, indicating 
later diagnostic dorsal spot. 
BREEDING 
The homed dace spawns in spring in stony shallow streams. Rosy-tinted belly 
and coarse tubercles on the snout constitute the breeding dress of the male. 
17. Clinostomus elongatus (Kirtland). Red-sided dace. 
RECORD OF CAPTURE 
The red-sided dace was never taken in Lake Erie but was found frequenting 
many of its small tributary streams. 
DESCRIPTION 
This brilliant little species very closely resembles the abundant Notropis, but the 
teeth in main row numbering 5-5 distinguish it from the latter, which usually has 4-4. 
23. 2 5 -millimeter stage . — Total length, 23.25; standard length, 19.2; length to 
vent, 12.5; length of head, 5.7; snout, 1.25; diameter of eye, 1.6; greatest depth 
before vent, 4.2; depth behind vent, 2.6; length to dorsal, 10.1; to anal, 13 milli- 
meters. Myomeres, 19 to vent plus 16 behind. Dorsal II (rudimentary), 8; anal I 
(rudimentary), 9; ventral origin very slightly in advance of first dorsal ray, ventral s 
reaching vent; caudal long and deeply forked. Body elongate, fusiform, with 
slender caudal peduncle; head large; snout long, pointed; mouth large, oblique, 
lower jaw barely projecting in this stage (projecting strongly in adult); lateral line 
abruptly decurved over anterior half of pectoral. 
Pigmentation. — Both jaws, and dorsal aspect of head are heavily pigmented 
with round black spots. A band extends the length of dorsal aspect with chromato- 
phores more loosely arranged to lateral line. Below lateral line the chromatophores 
are heavy again, forming a very inconspicuous band, about 4 chromatophores wide, 
from head to caudal. Ventrolateral and ventral aspects are without pigment except 
for about 4 chromatophores beneath abdomen and 4-6 on sides of ventral ridge 
from anal backward. Subsurface chromatophores occur on gill arches and stomach- 
intestinal region. Ventrals and pectorals are almost unmarked, but other fins have 
chromatophores along lines of rays. 
