326 
BULLETIN OP THE BUREAU OP FISHERIES 
ward to vent, 6 in a single series on ventral ridge of tail (less conspicuous than in 
5-millimeter stage), and 1 on caudal. The eye is black. 
These specimens are definitely unlike any other species previously taken by the 
survey, and their small size and lack of any adult characters make the determination 
extremely difficult. In this, as in similar cases, it is necessary to resort to a process 
of elimination, narrowing down the possibilities as far as possible and then temporarily 
choosing one. No young stages of Storer’s chub have been described, and since the 
Figure 29. — Erinemus storerianus, 9.5 millimeters 
smallest known specimen available is 21 millimeters, we are unable to tell what the 
larva may be like. Certain facts, however, suggest this species: (1) Such characters 
as the elongate body and slender caudal peduncle, rather short head with broad inter- 
orbital, large eye placed high, moderate horizontal mouth with lower jaw included, 
and prominent snout; (2) the great abundance of Storer’s chub in Lake Erie. The 
identification of these specimens as E. storerianus must, therefore, be subject to 
change. 
9. 5 -millimeter stage . — Total length, 9.5; standard length, 9.1; length to vent, 5.7; 
length of head, 2.0; diameter of eye, 0.5; greatest depth before vent, 1.2; depth behind 
vent, 0.75 millimeter. Myomeres, 19 to vent plus 19 + behind. Body more robust 
than preceding stage but otherwise unchanged. Ray development beginning ven- 
trally at lophocercal caudal. 
Pigmentation. — On the surface, 1 chromatophore is apparent at middle of 
ventral aspect of intestine and below the surface, 1 occurs at ventral edge of body 
where intestine turns downward to vent, and 2 along middle third of tail. (More of 
these ventral subsurface spots on tail are evident in other specimens, resembling 
more closely the prominent series of the 5-millimeter stage which has become almost 
hidden in larger preserved specimens.) 
2 1.0 -millimeter stage . — Total length, 21.0; standard length, 17.0; length to 
vent, 11.0; length of head, 4.5; snout, 1.2; diameter of eye, 1.4; greatest depth before 
vent, 3.35; greatest depth behind vent, 2.2; length to dorsal, 9.0; to anal, 11.5. Myo- 
meres, 19 to vent plus 17 + behind. Dorsal II (very weak), 8; anal II (very weak), 8; 
