386 
BULLETIN OF THE BUREAU OF FISHERIES 
A few are evident also on dorsal aspect of stomach region, very large and stellate in 
shape. Small round ones are arranged in 6 to 7 bands on sides of body extending 
obliquely from mid-dorsal line forward to a point midway between lateral and mid- 
ventral lines. These bands are not heavily marked but are made up of 6 to 12 small 
chromatophores. A few appear on lateral line near base of caudal. On mid-ventral 
line, there are about 6 widely separated ones to vent, and in more transparent speci- 
mens 9 subsurface chromatophores 
occur from vent to caudal in a single 
series j ust above the mid-ventral line. 
Figure 126 shows the dorsal 
aspect at this stage with interorb- 
ital space much wider than most 
fresh-water cottids, long spatulate 
snout, pointed in profile, tubular an- 
terior nares; and long preopercular 
spine directed obliquely upward. 
The depressed cavernous nature of 
the head is not brought out in the 
drawing. 
1 6 .2-millimeter stage . — D orsal 
VIII, 18; anal 15, pectorals 15; ventrals I, 4; caudal very long, rounded pos- 
teriorly. Total length, 16.2; standard length, 13.0; length to vent, 6.5; length of 
head, 4.2; length of snout, 1.0; diameter of eye, 0.8; greatest depth, 2.65; inter- 
orbital width, 0.9 millimeter. Myomeres, 10 to vent plus 23 behind. Changed 
from earlier stage principally in deepening of region behind head; heavier pigmenta- 
tion; the partial covering by skin of preopercular spines, and addition of another 
series of spiny processes between the dorsal series and the lateral line extending from 
over vent to a point more than halfway to caudal. 
Figure 126. — Triglopsisthompsoni, 12.5millimeters. Dorsal view of head 
Pigmentation. — The marking is intensified. A few chromatophores occur on 
upper jaw and many over top and sides of head. They are more or less con- 
centrated over the back and extend downward to lateral line region from behind head 
to vent. Four broad, well-marked oblique bands behind vent, the last at base of 
caudal, originate on dorsal aspect and extend obliquely forward nearly to ventral 
aspect. The ventral aspect and all fins are colorless. The eye is very black. 
There are certain characters which differ from the adult descriptions of Triglopsis 
thompsoni, but this species varies widely and our specimens are so small that it seems 
wisest to identify them thus, considering that these differences may be due to their 
immature condition. 
