358 
PROCEEDINGS OF THE NATIONAL MUSEUM. 
jaw only, those on upper jaw pointing- more outward than downward. 
Nostrils small, posterior ones slightly larger. Gill rakers short and 
slender, anteriorly inclined, about 15 on lower limb of arch; 5 rows of 
scales on cheek. Mandibles and edge of opercle naked. Scales below 
lateral line on middle of body largest, their depth being greater than 
the length. Fins naked, the dorsal with a scaly sheath. Pectoral fins 
pointed behind, the upper rays long'est, graduated, the tip reaching 
to yent. Ventral fins inserted below the second dorsal spine, their tips 
not reaching to that of the pectorals. Dorsal spines shorter than the 
soft rays, the last the longest; soft dorsal highest in front; anal spines 
small, the third the longest, much shorter than the soft ra3^s, in male 
seventh to tenth soft anal rays from the last prolonged almost eqvial to 
the length of pectoral fin, graduated posteriorly; males with the anal 
considerably depressed in front with a glandular appendage, the soft 
rays sometimes considerabl}" produced ; caudal wideh^ forked. 
Fig, 2.— Ditrema temmincki. 
Color silvery, steel blue on back; lower limb of preopercle with a 
black spot in front and another at the angle, these verj^ rarely obsolete: 
two black bars from eye toward maxillary, a dark blotch on upper end or 
opercle; upper half of spinous dorsal black; soft fin uncolored, or with 
a dark edge; anal and caudal fins dusky; pectorals uncolored, axil 
slightly dusky; tips of ventrals dark, with the first rays and the mem- 
brane between the fourth and fifth rays chalkv white. The ground 
coloration is sul)ject to consideral)le variation, but the two spots below 
the eye and the two stripes on snout are rarely absent. 
Here described from a specimen 8 j inches long from Tokyo. Our 
numerous specimens were collected Ijy Jordan and Snyder at Nagasaki, 
Hakata, Onomichi, Kobe, Wakanoura, Misaki, Tokyo, Same, Aomori, 
and Hakodate. The specimen from Hakata is the type of the accom- 
panj'ing figure. 
