8 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. 62. 
Dorsal, 23; caudal, 19; anal, 35; ventrals, 7; pectorals, 3. 
Head 7.1 (7.63 in total length), compressed, its profile oblique, its 
breadth equal to one-third its length; body long, compressed; great- 
est depth 12.8 (13.8 in total length); eye 5.12, lateral, circular; 
snout 3; mouth large, lower jaw projecting; maxillary 1.20, extend- 
ing about 2 eye diameters beyond vertical from posterior margin 
of eye; barbel long, filamentous, an ovoid bulb at tip; near the base of 
this bulb arises a long filament containing at intervals yellowish 
ovoid bodies; from the distal portion of the bulb arise five short 
filaments, four of which are simple, two of them containing ovoid 
bodies; the fifth terminates in an ovoid body from which spring 
two longer filaments, tridentlike, both of which bifurcate; each of 
Fic, 7.—EUSTOMIAS ENBARBATUS, NEW SPECIES. 
these latter contains in its proximal half several yellow bodies, 
the distal half being threadlike; teeth in both jaws in a single 
row, canine, of unequal length, their tips somewhat recurved, the 
largest in the upper jaw being the first, second, and fifth, in the 
lower jaw the second, fourth, and seventh; tongue with three pairs 
Fig. 8.—EUSTOMIAS ENBARBATUS, TIP OF BARBEL. 
of long recurved teeth; vomer and palatines toothless; interorbital 
4.5; body scaleless. 
A small oval luminous area close to maxillary behind eye; two 
rows of small, circular, nearly equidistant photophores on sides of 
body ventrally, the upper row extending to end of anal, the lower to 
5th anal ray, 27 in each row from pectorals to ventrals. 
Dorsal origin over 13th ray of anal, its termimation over 32d ray; 
distance from tip of snout to origin of dorsal 1.14, to anal 1.33, to 
ventrals 1.68, to pectorals 5.81; ventrals 1.28 in head, the two outer 
rays short, but the rays not divided into two groups; pectorals 1.8 
in head, the rays apparently filamentous, with a narrow membrane 
on both sides of each ray, not united at base. 
