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BULLETIN OF THE BUREAU OF FISHERIES 
Upon further development the body becomes deeper, head smaller, and pro- 
portions are more like the adult. Tiny chromatophores increase greatly in number 
from dorsal aspect to lateral line, and the ventral half of body is noticeably light- 
colored with pigment spots sparsely distributed. At 53 millimeters the anal is 
speckled with black. 
53.0- millimeter stage. — Total length, 53.0; standard length, 47.0; length to vent, 
35.0; length of head, 11.8; greatest depth, 11.25; diameter of eye, 3.75 millimeters. 
6 8.0 - millimeter stage. — Total length, 68.0; standard length, 58.0; length to vent, 
43.5; length of head, 14.5; depth at origin of dorsal, 13.15; diameter of eye, 4.0; 
length to origin of dorsal, 28.0 millimeters. 
83.0- millimeter stage. — Yearling. Total length, 83.0; standard length, 70.5; 
length of head, 18.5; depth of head, 11.5; length to dorsal, 35.5; greatest length 
of dorsal rays, 14.25; depth at dorsal, 15.0; length to ventrals, 36.5; greatest length 
of ventral rays, 12.0; length to vent, 52.2; greatest length of anal rays, 9.5; length 
to pectorals, 17.5; greatest length of pectoral rays, 12.0; length of maxillary, 7.0; 
interorbital width, 6.0; diameter of eye, 5.7 millimeters. Body fully scaled as in 
the adult. 
Pigmentation. — The yearling whitefish is greenish gray above, very silvery on 
sides and below, with an area of light amber extending from just behind pectorals 
to lateral line. The eye is blue, edged in black. 
The larval stages of Coregonus clupeaformis and Leucichthys artedi are easily 
confused, and the very small number of herring obtainable prevented us from formu- 
lating any rules of identification. It will be necessary to study many more specimens 
before we can be sure that the differences noted herein are constant. 
I have pointed out a few outstanding characters in the above descriptions, 
especially the diffusion of yellow color in the whitefish throughout the yolk region, 
head, and sometimes over the whole body, as contrasted in the herring with the 
restriction of this pigment to the yolk sac. Furthermore, the double dorsal series of 
chromatophores in the whitefish is symmetrical, even, and continuous from behind 
head to tip of tail, while in the herring it becomes broken and uneven from shortly 
behind head often to a point more than halfway to vent. Although this character 
is certainly a valuable indication of the species, it can not be depended upon, for in 
our large collection of whitefish there were many in which the dorsal series was thin 
and sometimes quite uneven in this region, while among the dozen hatchery specimens 
