396 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 
these marks are seasonally made. If these zones are season indi- 
cators, then the type specimen was in its fourth or fifth year. . 
Eight series of scales separate the front of the second dorsal 
from the lateral line series in the type and in seven paratypes, 
but there are seven series in two paratypes. The scales on the 
mandible, in a single row anteriorly, become biserial posteriorly. 
The lateral ne below the anterior end of the second dorsal 
suddenly dips downward, as in other species, to its position below 
the middle of the tail. 
The first dorsal spine is concealed; the second is three-fourths 
as long as the length to anus, but varies from a little less than 
two-thirds to 1.05 times that distance. The second pectoral ray 
is lengthened into a slender filament 1.4 times the length to anus 
(varying to slightly shorter than that distance in the paratypes). 
The outer ventral ray is always less than twice as long as the head 
and is always shorter than the length to anus, being 0.7 of that 
length in the type. The origin of the first dorsal is almost on a 
vertical with the insertions of the paired fins. The distance be- 
tween the anus and the ventral is more than two-thirds the length 
of the head. 
The pyloric caeca are short and numerous, 61, 69, and 75 in the 
three specimens counted. 
Color, in alcohol, deep brown, lighter below and with silvery 
reflections on the lateral and ventral surfaces of the head and trunk; 
the branchiostegal membranes are dark brown, the gular mem- 
branes light; the lower lp is white. The walls of the buccal 
cavity are light near the mouth; the branchial cavity is lined 
with purplish black, with a wide whitish area along the opercular 
and branchiostegal margins. Parietal portions of peritoneum and 
the visceral portions over’ all the organs except the pyloric caeca, 
deep purplish black. Dorsal black, a little lighter on basal part 
of fin; anal light anteriorly, but shading into black posteriorly. 
Pectoral and ventral dark, with lighter filaments and a lighter 
area near their lower or inner basal portions. Other specimens are 
very much lighter in color; in these only the first dorsal is blackish, 
and it is lighter near its base, and dusky posteriorly; only those 
rays of the paired fins next to the filaments are dark; the dark 
portion of the branchial cavity is brown with lhghter clouding, 
while the peritoneum shows much silvery through the dusky pur- 
plish color. 
The distinguishing characters of this species are given in the 
key. It is probably most closely related to @. colletti, its Japanese 
representative, though allied with @. magnifilis, the next species 
to be described. 
