4 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. 62. 
eye diameters behind vertical from posterior margin ‘of eye; barbel 
long, filamentous, simple, ending in a smooth. ovoid knob, its length 
1.56 in length without caudal; teeth in both jaws in a single row, of 
unequal length; in the upper jaw two pairs of long, hollow canines, 
barbed at tip, followed by five pairs of much smaller teeth, recurved 
at tip; these are followed by 12 pairs of small straight recumbent 
teeth; in the lower jaw two pairs of large and five pairs of smaller 
canines, bladelike and barbed at tip, the first two pairs fitting in 
grooves on side of snout when mouth is closed; each of the larger 
fangs appears to have one or more rudimentary fangs at its base, 
and a minute pore at the tip, opening by a duct into the cavity of 
the tooth; tongue with two groups of strong retrorse teeth; palatines 
with four small teeth on each side; vomer toothless; interorbital 
space 4; body scaleless. 
A white, ovoid light organ lying in a slitlike socket behind and 
below eye; a yellow, elongated suborbital organ lying within orbit 
at basal margin of eye; two rows of small photophores on each side 
of body ventrally, the upper row consisting of 6 linear groups from 
pectoral to ventral, 4, 3, 3, 3, 3,4, then a group of 3 and 8 single, 
more or less equidistant, to vertical from origin of anal, where the 
row ends in a group of 4; ventral row with 6 clustered groups of 2 to 
4 each from pectoral to ventral, then 5 linear groups of from 2 to 4 
each to above origin of anal; a single row of 11 photophores over 
base of anal to end of caudal peduncle. 
Dorsal origin very slightly behind that of anal, the bases of both 
fins elevated anteriorly; distance from tip of snout to origin of dorsal, 
1.23; to anal, 1.27; to ventral, 1.70; caudal, 2.28 in head, its lower 
lobe the longer; ventrals, 1.71 in head, behind middle of body, the 
rays filamentous at tip; pectorals, 1.85 in head, filamentous. : 
Color in alcohol, head and body very dark sooty brown, almost 
black, finely sprinkled with minute white granulations; dorsal and 
anal black basally for about the first 8 or 9 rays; caudal unpigmented ; 
ventral rays spotted with black; pectorals unpigmented; suborbital 
organ yellow; postorbital organ white; barbel white, with a series of 
minute black dots, bulb at tip of barbel yellowish. 
Type.—Cat. No. 84290, U.S.N.M., 46 mm. long, taken with a 
townet at Station 10161 about 115 miles east from Cape Hatteras, 
at a depth of from 100 to 0 meters. 
(tittmanni, named for Dr. O. H. Tittmann, former Superintendent 
of the United States Coast and Geodetic Survey, who authorized the 
use of the Bache for the South Atlantic expedition.) 
