332 BULLETIN OF THE BUREAU OF FISHERIES 
19. Notropis delioiosus stramineus (Cope). Straw-colored minnow. [Hybopsis 
deliciosa straminea Cope. Jordan, Evermann, Clark, p. 134.] 
RECORD OF CAPTURE 
On July 28, 1928, eight small specimens ranging in size from 4.7 to 11.5 milli- 
meters were taken near the mouth of Muddy Creek, and a 16.3-millimeter fish was 
seined at Long Point Bay on August 22. In 1929 none appeared in our collections 
until August 6; larvse and postlarvse were extremely abundant from Angola to Port 
Dover in the eastern and about Point Pelee in the western parts of the lake for the 
next 2 weeks, as many as 85 having been taken in a 5-minute haul at station 06.47. 
They were found on the bottom as well as at the surface in water of 1 1 to 34 meters. 
Adults are found abundantly, especially during late June and early July when they 
come close inshore for spawning. 
DESCRIPTION 
The smallest larva is distinguished from the closely related N. atherinoides by 
its shorter, heavier body, pigmented eye, and chromatophore series above and below 
the intestine and along ventral ridge, and by the location of the vent at the nineteenth 
myomere (at twenty- third or twenty-fourth in N. atherinoides). In advance stages 
of development the pigment patterns of the two species become much alike, but the 
deeper head and body, the different myomere count (19 or 20 to vent plus 1'6 behind 
in the present species; 23 to vent plus 12 or 13 behind in N. atherinoides ), and the 
insertion of the ventrals in N. deliciosus stramineus only 1 myomere before the 
beginning of dorsal fin (about 4 myomeres distant in N. atherinoides ) serve to differen- 
tiate them, even though the young of both species may be found together. 
5.0-millimeter stage. — Total length, 5.0; length to vent, 3.0; length of head, 0.9; 
snout, 0.05; diameter of eye, 0.35; greatest depth before vent, 0.08; depth behind 
vent, 0.07 millimeter. Myomeres, 19 (20) to vent plus 16 behind. Yolk sac 
absorbed; single air bladder; head remarkably broad, broader than deep; snout short, 
very obtuse; tail lophocercal. 
Pigmentation. — The eye is black. Dorsal aspect of air bladder is very dark, 
and subsurface chromatophores occur above intestine to vent. There are many 
chromatophores on ventral surface of stomach region, continuing as a very uneven 
double series to vent. A few appear on ventral ridge behind vent. 
6 .5 - millimeter stage. — Chromatophores larger and arranged in more regular 
series above and below intestine, and on ventral ridge behind vent. Head still 
broader than deep as in preceding stage. Slight concentration in marginal fin indi- 
cating position of dorsal. 
7.5- millimeter stage. — Total length, 7.5; standard length,- 7.05; length to vent, 
4.7 ; length of head, 1.5; snout, 0.2; diameter of eye, 0.55; greatest depth before vent, 
