SIXTY-TWO SPECIES OF FISHES FROM LAKE ERIE 
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of young herring studied, one had a perfectly continuous line indistinguishable from 
that of the whitefish. In all our herring specimens the pigment over the intestine 
was very much less noticeable than in the whitefish. 
In the specimens studied, the body of the whitefish was deeper than that of a 
herring of like size, and usually the latter species was somewhat more advanced in 
development at the same length. The more elongate body of the herring may be 
found to be a constant factor when the two species are reared together, subjected 
to the same temperature and environmental conditions, but only when this is done 
can complete faith be placed in proportional differences, so great is individual variation 
within the species. As an example, may I quote Ada Hall (1925) concerning the 
whitefish: “Fry hatching at 1, 2, and 4 months after spawning differ in size of body 
but not in size of yolk; those hatching at 4 months are 4 to 6 millimeters longer than 
those hatching earlier.” 
With the large number of hatchery herring promised for future study we hope 
to sift out of the present possibilities whatever differences are constant. 
BREEDING 
The whitefish spawns in N ovember and early December, as does the herring, the eggs 
hatching the following spring. Theperiodof incubation is dependent upon temperature. 
Family SALMONIDJE, Trouts 
5. Cristivomer namaycush namaycush (Walbaum). Lake trout. [Cristivomer 
namaycush (Walbaum). Jordan, Evermann, Clark, p. 59.] 
RECORD OF CAPTURE 
None of these uncommon fishes was taken by the Shearwater in 1928 and 1929, 
but eggs and newly hatched larvae were supplied for study by the Cape Vincent 
hatchery. The species is restricted to the deeper parts of the lake where it is taken 
rarely by gill nets. 
DESCRIPTION 
Newly hatched larva, 16.0-millimeter stage. — Total length, 16; standard length, 
14.78; length to vent, 10.3; length of head, 3.0; snout, 0.5; greatest depth before 
vent, 5.6; greatest depth behind vent, 2.9; diameter of eye, 1.1 millimeters. Myo- 
meres, 42 to vent plus 20 + behind. Characterized by exceptionally large yolk sac, 
