SIXTY-TWO SPECIES OF FISHES FROM LAKE ERIE 
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55. Cottus bairdii kumlieni (Hoy). Lake sculpin, miller’s thumb. [Cottus jrank- 
lini Agassiz. Jordan, Evermann, Clark, p. 385.] 
RECORD OF CAPTURE 
The subspecies kumlieni is found in both shallow and deep waters of Lake Erie 
and the Niagara River. Although only one specimen was captured in 1928 (on June 
11 over Seneca Shoal in a bottom Helgoland trawl at 10.5 meters), larvae and post- 
larvae were taken quite generally from June 7 to Juty 11, 1929, especially along the 
Figure 128 . — Coitus bairdii kumlieni, 6.6 millimeters 
Canadian shore from Long Point toward the far western portion of the lake. The 
subspecies found toward the headwaters of the tributary streams was G. bairdii bairdii. 
DESCRIPTION 
In the youngest stages it is. quickly recognized by the single large chromatophore 
at vent, myomere count of 10 plus 23, and the maxillary reaching only to front of 
pupil, and later by its stouter body and lack of the even series of spines on the body 
characteristic of Triglopsis. The marginal fin-ray counts of all of our specimens range 
slightly higher than the usual number given in descriptions of adults, being consistently 
dorsal VI to VIII, 16 to 17; anal 12 to 15, but the variability of the sculpins is great 
and the increased number may be constant for this subspecies. 
6 .6 -millimeter stage. — Total length, 6.6; length to vent, 2.6; length of head, 1.15; 
snout, 0.3; diameter of eye, 0.31; greatest depth before vent, 0.9; depth behind vent, 
1.1 millimeters. Myomeres, 10 to vent plus 23 behind. Distinguished by very long 
marginal fin-fold originating at nape, short intestine, very large unrayed pectorals 
reaching halfway to vent, very broad head with dorsal profile rounded above; lopho- 
cercal tail. Although the intestine already is coiled once, some yolk material remains, 
containing one moderate oil globule near vent. 
Pigmentation. — The body is almost colorless except for a single very large, stel- 
late chromatophore on underside shortly before vent, and 4 very small, hardly 
perceptible, linear-shaped ones on ventral margin of tail. 
7.2-millimeter stage. — Total length, 7.2; length to vent, 3.1; length of head, 1.3; 
snout, 0.35; diameter of eye, 0.35; greatest depth before vent, 1.03; depth behind 
vent, 1.2 millimeters. Myomeres, 10 to vent plus 24 behind. Much like preceding 
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