Hymenoeephalm papyraeeus Jordan & Gilbert, new species. Type. 
greatly widened; its width an angle two-ninths that of head; its margin coarsely crenate or dentate; 
gill membranes widely joined anteriorly free from isthmus; first dorsal spine very slender and smooth, 
apparently not filamentous; the interval between dorsals equals twice the length of base of first; origin 
of anal is behind vertical from middle of interspace, immediately preceded by anal opening; outer 
ventral ray barely reaches origin of anal; its length 1.6 in head. No scales are preserved. From the 
size of the scale pouches there must have been two or three scales between the middle of sides and 
origin of second dorsal. 
Color brownish anteriorly on dorsal region, posteriorly becoming light gray, very coarsely specked 
with black; corner of mouth whitish, mouth otherwise black; buccal cavity shining silvery, with a 
black cross streak behind premaxillaries and a longitudinal streak in front of tongue; posterior part of 
buccal cavity black; lining of gill cover anteriorly whitish, posteriorly black; gular membrane and 
sides of isthmus, including area above and behind base of ventrals, silvery, finely striated with purplish 
black, as in other species; breast and abdomen purplish black. A minute lens-like body on middle of 
lireast and one immediately before the vent, the two connected by a black line along median line of 
peritoneum. 
One specimen obtained in Sagami Bay. 
( Ttajrvpo^, paper.) 
614 BULLETIN OF THE UNITED STATES FISH COMMISSION. 
97. Hymenocephalus papyraeeus Jordan & Gilbert, new species. 
Type 147 mm. long, from station 3697, in Sagami Bay, depth 120 to 265 fathoms; No. 50935, U. S. 
Nat. Mus. 
Differing from II. letlionemus and from all the Hawaiian species in having a distinct mandibular 
barbel. It also differs strikingly in the much more robust head and body. 
First dorsal ii, 9; ventral 11; head 6 in total length; depth 7.5; branchiostegals, 7. 
Body heavy anteriorly, tapering very rapidly behind first dorsal; head very deep, with a high, 
median crest, which extends well above upper line of orbits; cheeks vertical, suborbitals hardly at all 
swollen; crests on head very high, thin, and papery, bridged over by excessively delicate membrane; 
interorbital width 2.6 in head; longitudinal diameter of orbit 4; length of snout 3.4; middle of 
length of head between hinder edge of orbit and pupil; snout massive, wide, and bluntly rounded, 
with a very short projecting point at tip, which extends beyond premaxillaries a distance less than 
half diameter of pupil. 
Mouth oblique, nearly terminal, wide, the maxillary reaching a vertical from hinder margin of 
pupil; its length 1.9 in that of head; teeth minute, equal, in narrow bands in both jaws, the mandib- 
ular band the narrower; barbel short, but evident, less than half diameter of pupil; preopercle 
