NEW PHILIPPINE FISHES—FOWLER 75 
large occipital spine with rather long base each side; postocular keel 
ends in blunt suprascapular spine; opercle with 2 keels diverging 
backward, lower horizontal and longer or long as eye, both ending in 
short spine; keel of suborbital stay entire, nearly straight or but 
little undulous; preopercle ends in long strong spine 11% in eye. 
From above gill opening 30+1 bony lateral plates; 4 rows of 
diminishing spiniferous plates on trunk; spines all large, strong, 
erect and with surfaces finely rugose or striate; hind pair of plates 
on. belly before vent 114 length of front pair; arc of 5 small scutes 
from over gill opening downward. 
D. VII—17, first spine 3% in head, fifth ray 314; A. 17, fifth ray 
4; caudal 214, convex behind; least depth of caudal peduncle 214 
in eye; pectoral 31% in head, rays 1, 10—1, upper detached ray 2 in 
head and reaches 114 to anal origin; ventral rays I, 5, fin 2449 in 
head. 
Color in alcohol largely pale or light uniform brownish, paler 
below. Iris pale. Fins immaculate like body. 
Known among all the representatives of its family by the very 
long head, longer than the rest of the body, the armature and the 
long pectoral filaments longer than the pectoral fin. 
Type—U.S.N.M. No. 99516. D. 5374. Tayabas Light (outer), 
N. 9° E., 7.4 miles (lat. 18°46’45’” N., long. 121°35’08’’ E.), Marin- 
duque Island and vicinity. In 190 fathoms. March 2, 1909. No. 
24281. Length 195 mm. from end of broken frontal projections to 
hind end of broken caudal. 
(longiceps, long head.) 
ACANTHOSTEDION, new genus 
Type.—Acanthostedion rugosum, new species. 
Head as seen from above rather elongately hexagonal. Pair of 
rather long rostral extensions in form of isosceles triangle, subequal 
with or slightly less than snout in length. Eye large, supralateral, 
in posterior half of head. Maxillary short. Mouth small. Two 
pairs of rather small barbels, posterior longer branched. Inter- 
orbital concave. Preopercular spine very long, reaches well pos- 
terior in pectoral fin or close before anal fin origin, greatly posterior 
to end of small opercular spine. Large, though short and strong 
postero-supraorbital spine. Pair of very long, inclined, and prom- 
inent occipital spines, reaching far into first dorsal fin. Dorsal with 
five spines, fin subequal in height with second dorsal. Anal opposite 
and similar to second dorsal. Caudal slightly emarginate behind. 
Pectoral moderate, reaches into front of anal, two lower detached 
rays subequal in length with upper rays. Ventral longer than pec- 
toral, reaches anal. Coloration uniform. 
