SIXTY-TWO SPECIES OF FISHES FROM LAKE ERIE 
389 
Dorsal VII, 17; anal 14; pectorals reaching practically to vent; caudal well formed; 
ventrals I, 4. Resembling later stages in general characters, but body slightly 
more slender, fins lower, and heavy adult pigment lacking. 
Pigmentation. — Chromatophores are limited to 2 on either side of head above 
eye, 1 at ventral extremity of each pectoral base, and 1 which forms the characteristic 
vent spot of earlier stages. 
19.0-millimeter stage . — Total length, 19.0; standard length, 15.1; length to vent, 
8.25; length of head, 5.0; diameter of eye, 1.75; greatest depth, 3.5 millimeters. 
Myomeres, about 12 to vent plus 23 behind. Dorsal VIII, 16; anal 12; ventrals 
I, 4. Body rather robust but more slender than C. bairdii bairdii; head very broad; 
preopercle with short, sharp, straightish spine turned upward and backward, with 
two smaller spines below; bones of head not cavernous; mouth terminal, oblique, 
maxilla to pupil; gill membranes attached to wide isthmus. 
Pigmentation. — Small brownish chromatophores evenly cover dorso-lateral 
aspect of head and body and occur on and below the surface in brain region. Two 
wide bands obliquely cross dorsal ridge beginning at dorsal; another wider band extends 
down either side beyond the lateral line; and a fourth long bar appears at end of 
dorsal, followed by two or three small bars on caudal peduncle. Below the lateral line, 
pigmentation is in blotches with elear spaces between where skin is very white. 
Figure 132 . — Cottus bairdii kumlieni, 11 millimeters 
Ventrally about 15 very small chromatophores occur in gill region, a series of about 9 
on either side of anal, and a small group behind this fin. All fins but ventrals are 
spotted or barred with chromatophores. 
56. Cottus bairdii bairdii Girard. Sculpin, miller’s thumb. [Cottus idalops 
(Rafinesque). Jordan, Evermann, Clark, p. 385.] 
RECORD OF CAPTURE 
A single larva 6 millimeters long taken in the far northwestern portion of the 
lake on July 2, 1929, differs from specimens of C. bairdii kumlieni found to the east- 
ward. Its capture immediately off the Detroit River suggests the subspecies C. 
bairdii bairdii, which is common in the tributaries and which might under certain cir- 
cumstances be carried into the lake itself. Sculpins vary so considerably that this 
may be identical with kumlieni, but the differences are sufficient to warrant a tentative 
separation. 
DESCRIPTION 
The present larva resembles C. bairdii kumlieni in myomere count (10 plus 22 
or 23), but differs in its very large mouth, maxilla reaching to middle of eye whereas 
in the latter it reaches barely to front of pupil, a wider interorbital space, and a more 
conspicuous chromatophore senes on ventral aspect of tail. 
