PHILIPPINE MACROUROID FISHES—GILBERT AND HUBBS. 539 
PAPYROCEPHALUS, new subgenus. 
Ty pe-species—Hymenocephalus aterrimus Gilbert. 
Three species of Zymenocephalus differs so widely from all others 
in certain characters that we have erected for them this new sub- 
genus, Papyrocephalus. These species are H. aterrimus Gilbert * 
(Hawaiian), #7. papyraceus| Jordan and Gilbert? (Japanese), and 
H. barbatulus, new (Philippine). They are mutually character- 
ized by their deep, sharply compressed bodies; by the excessive de- 
velopment of the shallow sensory canals of the head; by having 
the bony septa even much thinner and weaker than in typical 
Hymenocephalus; by the great width of the suborbital and pre- 
cpercle; by the small eye; and by the blackish color, they being 
without the silvery sides characteristic of all other known forms. 
) 
53. HYMENOCEPHALUS BARBATULUS, new species. 
Ty pe-specimen.—Cat. No. 83652 U.S.N.M., 98 mm. long to end of 
tail, which is broken at its extreme tip, 27 mm. to anus; dredged 
with the single paratype 57 mm. long at Albatross station 5238, in 
Fig. 34.—HYMENOCEPHALUS BARBATULUS. TYPE. 
the Pacific Ocean, off the eastern coast of Mindanao; 380 fathoms; 
bottom temperature, 43.0° F. 
Fin-rays—first dorsal, II, 8; pectorals, about 10; ventrals, 7 
(11 in papyraceus, 13 or 14 in aterrimus). 
The body is deep and compressed, tapering rather abruptly into 
the usual whip-hke tail; greatest depth of body, 1.4 in length of 
head; greatest width of head, about equal to postorbital length of 
head. The head is bluntly rounded anteriorly, its lateral contours 
are subparalle!. The length of the blunt snout is greater than that 
of the orbit, is nearly equal to the interorbital width, and is con- 
tained 3.3 times in the length of head. The orbit is small, being 
‘Gilbert, Bull U. S. Fish Comm., 1903 (1905), sec. 2, p. 666, pl. 93. 
2 Jordan and Gilbert, Bull. U. S. Fish. Comm., 1902 (1904), p. 614, text figure. 
