SIXTY-TWO SPECIES OF FISHES FROM LAKE ERIE 
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DESCRIPTION 
The earliest larvae are characterized by a very prominent, overhanging snout, 
and elongate clear yellow yolk sac with one large oil globule anteriorly placed. In 
later stages the slightly inferior mouth, very elongate body, and short head with 
wide interorbital are diagnostic. Myomere count of 19 plus 17, as well as head differ- 
ences and pigmentation, distinguish the young from those of the equally elongate N. 
atherinoides. (Myomere count of latter, 23 plus 12-13.) 
5.0-millimeter stage . — Total length, 5.0; length to vent, 2.6; length of head, 0.73; 
snout, 0.25; diameter of eye, 0.25; greatest depth before vent, 0.75; greatest depth 
Figure 27 . — Erinemus storerianus, 5 millimeters 
behind vent, 0.76 millimeter. Myomeres, 18 before vent plus 21 behind. Charac- 
terized by extremely delicate, slender body, clear yellow elongate yolk sac with one 
large oil globule located anteriorly, rather small eye placed low, dorsal marginal fin 
fold low, originating shortly before vent, continuous around lophocercal caudal and 
forward past vent to yolk sac, much wider ventrally, and the very long, overhanging 
snout without mouth opened. 
The newly hatched specimens differ markedly from those of N. atherinoides in 
having the eye fully pigmented, a much shorter intestine, and deeper yolk sac of clear 
yellow with a large oil globule in anterior region. The sparsely distributed ventral 
chromatophores behind the vent and on the stomach are characteristic. The size 
is about as in N. atherinoides, but these specimens are somewhat slenderer even than 
that elongate species. 
Pigmentation. — Two irregular lines of stellate chromatophores are evident on 
underside of yolk region, a pair on either side of body where intestine bends downward 
to vent, and a single series of about 12 small ones on ventral margin, farther apart 
forward but smaller and near together toward caudal region. In further develop- 
ment these ventral line chromatophores become further embedded below the surface 
and less conspicuous for this reason. 
7.0-millimeter stage . — Total length, 7.0; length to vent, 3.9; length of head, 1.25; 
snout, 0.23; diameter of eye, 0.38; greatest depth before vent, 1.08; greatest depth 
behind vent, 1.0 millimeter. Myomeres, 18 to vent plus 21 behind. 
Pigmentation. — One chromatophore appears at ventral base of each pectoral, 
2 small chromatophores on ventral aspect of intestine, 1 where intestine turns down- 
