366 
BULLETIN OF THE BUREAU OF FISHERIES 
vent, continous around lophocercal tail (in which concentration ventrally already 
indicates formation of caudal rays), and corresponding to dorsal. contour on the ventral 
side. Mouth large, maxilla to posterior margin of pupil; both jaws armed with canine 
teeth. 
Pigmentation. — The marking is confined to one large chromatophore on ventral 
side about halfway from pectoral base to vent, and a few barely distinguishable on 
dorsal aspect of air bladder. 
13.0-millimeter stage . — Total length, 13.0; standard length, 12.5; length to vent, 
6.5; length of head, 2.8; diameter of eye, 0.68; greatest depth before vent, 2.5; depth 
Figuke 91 . — Stizostedion canadense griseum, 9 millimeters 
behind vent, 1.4 millimeters. Myomeres, 17 to vent plus 27 behind (incomplete). 
Snout lengthening and becoming pointed (differing from Perea in this respect) with 
well developed canines evident; mouth terminal. Marginal fin fold abruptly elevated 
immediately behind vent over the basal elements of about 15 rays ; persisting ventrally 
with basal elements and suggestions of about 11 rays; caudal becoming heterocercal, 
its lower rays developed. Large simple air bladder; intestine coiled; vent open, intes- 
tine ending away from body, at edge of marginal fin. 
14- 6 -millimeter stage . — Dorsal XIII-I, 15 (incomplete); anal II, 10 (incomplete); 
pectorals rather small; ventrals small, below pectorals; caudal emarginate. Total 
length, 14.6; standard length, 12.6; length to vent, 7.7; greatest depth, 2.0; diameter 
of eye, 1.0 millimeter. Myomeres, 21 to vent plus 21 behind. Body elongate, dorsal 
contour slightly depressed before soft dorsal and anal, and somewhat depressed just 
behind head; head pointed, sides quite parallel, eyes directed sideward; mouth ter- 
minal; large curved teeth in both jaws; maxillary reaching to posterior margin of 
pupil. First dorsal, consisting of 13 slender spines, originating just behind ventrals. 
Pigmentation. — The 14.6-millimeter specimen is mostly opaque white. One 
large chromatophore is apparent on dorsal side of intestine at vent, and a double 
ventral series of about 25 small, uneven, inconspicuous pigment spots (12 of them 
around anal) extends from vent to end of body. A few occur in the thoracic region 
and near the posterior limit of lateral line. 
27 .0-millimeter stage . — Total length, 27.0; standard length, 22.0; length to vent, 
13.8; length of head, 7.7; snout, 2.0; diameter of eye, 2.0; greatest depth before vent, 
