70 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 
smallest and directed down; two small rather closely set short oper- 
cular spines, directed back. 
Body scaleless. On back small, inconspicuous, scattered, short fila- 
mentous points. Along lower front edge of mandible uneven fringe 
of cutaneous filaments, posterior longest. 
D. IX, 13, first spine 334 in total head length, third ray 214; A. 
II, 11, second spine 534, eighth ray 2%; caudal 124, hind edge con- 
vexly rounded; least depth of caudal peduncle 44; pectoral 114, rays 
I, 11; ventral rays I, 5, fin 144 in total head length. 
Color in alcohol brown, variegated with darker on back, forming 
two broad vertical blotchlike bands below first dorsal and five bands 
transversly on second dorsal. Six dark brown bands radiate from 
eye. Caudal pale, uniform. Anal dark gray terminally on lower 
border of fin. Pectoral dark terminally and two transverse gray 
bars basally, with lower end of free ray blackish. Ventral dark 
gray on lower border. 
A very distinct species and easily distinguished from Minous mono- 
dactylus (Schneider) by its armature. Especially characteristic are 
the five parallel longitudinal keels within the whole extent of the 
interorbital space. Comparison made with two examples of Minous 
monodactylus, 114 to 117 mm. long from Kagoshima, Japan (U.S. 
N.M. No. 71667). 
Type.—uU.S.N.M. No. 99515. D. 4930. NE. point Yaku Shima, 
N. 19° W., 10.7 miles (lat. 30°12’N., long. 130°44’E.), in Colnett or 
Vincennes Strait. In 84 fathoms. August 15, 1906. Length 103 mm. 
(quintus, five + carina, keel.) 
Genus OCOSIA Jordan and Starks 
OCOSIA GRACILE, new species 
FIGURE 14 
Depth 314; head 224, width 1%. Snout long, broad, rather pointed 
front end forms well below level of eye, length 17% in head measured 
from snout tip; eye 474, 114 in snout, greatly exceeds interorbital, high 
but not entering upper profile of head; orbit 31% in head as measured 
from snout tip; maxillary reaches below first third of eye, expansion 
2 in eye, length 224 in head measured from snout tip; mouth large, 
little inclined from horizontal, lower jaw little protruded in front; 
lips broad, fleshy, smooth; teeth in villiform bands in jaws, upper 
band little broader; broad bands of villiform teeth on vomer and 
palatines; bony interorbital width 34 of eye or 834 in head as measured 
from snout tip; preorbital with 2 spines, both directed backward and 
upper much longer; 4 spines along hind edge of preopercle, upper- 
most largest. Guill opening large, deeply cleft and extends forward 
opposite middle of eye. Gill rakers 3+6, rather robust, tuberculiform, 
barely half long as gill filaments which are 234 in eye, 
