64U 
PROCEEDINGS OF THE NATIONAL MUSEUM. 
VOL. XXIV. 
posterior canine present. Pseudobranchise large; gill-rakers on first 
arch 3+9, small, pointed. Eye nearer to tip of snout than to edge 
of opercle a distance about equal to two-thirds its diameter. Edge of 
preopercle smooth, opercle with a flap equal in length to diameter of 
eye. Lips thin, the lower one pendant on the sides of mouth, divided 
anteriorly. Scales before dorsal small in 6 or 8 rows, crossing the 
median line. 
Scales not forming a sheath at base of fins, smaller on belh" than on 
upper parts, veiy small on nape and breast; head entirely naked. 
Lateral line complete, abruptly bent downward below base of soft 
dorsal. 
Membrane of spinous dorsal not incised, the spines slender, short, 
the longest 2i in head; dorsal rays slightly higher than spines. Anal 
spines ver}^ small and weak, the third about 3^ in head, longest ray 2. 
Dorsal and anal rays when depressed not reaching base of caudal. 
Caudal rounded, 1^ in head. Pectoral rather truncate posteriori}^, If 
in head. Ventrals filamentous. If in head. 
Fig. 8. — Halk'hceres tremebundus. 
Color in spirits, dusky above, lighter below^; a small, distinct brown- 
ish black spot on upper edge of base of pectoral; dorsal pale, mottled 
with pale brownish, without black spot or edging; iris green. 
Described from a specimen about 100 millimeters long, Type No. 6853, 
Leland Stanford Junior University Museum, from Hiroshima. We 
have examined both males and females and find no external difl^erences. 
It is one of the smallest and slenderest species of the genus, differ- 
ing principally in color and in greater slenderness from II. Ueekeri. 
We have 15 specimens, from Misaki, Hiroshima, Kobe, Wakanoura, 
Onomichi, and Nagasaki. 
{tremehimdus, timid.) 
17. CORIS Lacepede. 
Cor is Lacepede, Hist. Nat. Poiss., Ill, 1802, p. 96 {(njgula). 
Body compressed, oblong, covered with moderate or small scales, 
about 60 in the lateral line; head scalcless; lateral line not interrupted; 
