58 
BULLETIN OF THE BUREAU OF FISHERIES 
the head and nape. Dusky color is present around the mouth and across the middle 
of the mandible. The distal portion of the tail remains pale and more or less trans- 
parent, the upward curved notochord within it being plainly visible under the micro- 
scope with transmitted light. Slight dark color has appeared on the anal and on the 
margin of the spinous dorsal (fig. 5). 
The fish at this size bears about the same recognition marks as in somewhat 
smaller specimens. However, the head is less strongly compressed, the mouth is less 
oblique, the spinous dorsal and ventral fins are now developed, the caudal fin has be- 
come somewhat produced and pointed, and the dark markings on the body have in- 
creased greatly in number and cover a larger area. 
Specimens 10 millimeters long . — The body is moderately deep, compressed, the 
greatest depth being contained about 3.6 to 3.8 times in the length to base of caudal 
fin. The head is moderately compressed, and its length is greater than depth of body, 
being contained about 2.75 to 3.1 in length to base of caudal. The interorbital is 
strongly convex; the eye is only a little longer than the snout, and it has a rather 
large, perfectly round pupil. The mouth is moderately oblique, the upper lip ante- 
riorly being slightly below the level of the lower margin of the eye; the maxillary 
reaches nearly to posterior margin of eye; and the upper jaw projects beyond the lower 
one. The fins are all well developed, and the rays may be enumerated accurately. 
The longest dorsal spines reach only slightly past the origin of the second dorsal 
when deflexed ; the caudal fin is nearly symmetrical and quite pointed ; and the ventral 
and pectoral fins are long, generally coterminal, reaching nearly or quite to the vent. 
The fish has dark chromatophores almost everywhere, except on its ventral surface. 
They are most numerous on the side from opercular margin to end of base of anal, and 
few on the head and caudal peduncle. The spinous dorsal and the anal fin generally 
are partly black; the caudal fin has at most a few dark points on the base, and the 
other fins are without color (fig. 6). 
