278 DEEP SEA FISHES. 
smallest, second largest and equalling about three fourths of the length of 
the orbit; the narrow maxillary denticulate in its posterior half; mandible 
with seven teeth, anterior and posterior small, third as large as the second 
upper; head of vomer with one fang at each side; each of the very crooked 
palatines bears two fangs, the anterior directly backward from the vomerine 
tooth ; no lingual teeth. Barbel fleshy and rather thick in the entire basal 
portion; distal portion, one fourth of the length, trifid; proximal section 
ending in a luminous bulb from which the three extremities start. 
Dorsal origin little if any more than a length of the head from the base 
of the caudal, above the fourth anal ray; base of fin separated from the 
short rays of the caudal by the length of the orbit; longest rays reaching 
the base of the caudal. Four of the anal rays lie behind a vertical from the 
last ray of the dorsal, longest ray extending to the base of the longest ray 
of the caudal. Ventrals small, of five rays, inserted at four fifths of the 
distance from the pectorals to the caudal base, reaching little more than half 
way to the anal origin. Pectorals small, of six rays, nearly or quite as long 
as the ventrals, situated low on the flank. Caudal forked. 
A large luminous organ below and backward of the eye between it and 
the maxillary; eighteen similar organs form a series at the bases of the 
branchiostegal rays; at each side of the isthmus there are nine more; on 
the body in each ventral series there are forty-three from the isthmus to the 
ventrals, twelve from the ventrals to the anal, and sixteen from the origin 
of the anal to the base of the caudal, that is eighty in the entire series; in 
the series from the shoulder there are thirty-nine of the light organs for- 
ward of the ventrals, and twelve from the latter to the origin of the anal. 
As in S. hexagonatus, this species is marked with hexagonal areas, in each 
of which there is a black spot including a white dot. General appearance 
blackish, with lighter fins. The barbel is whitish to the trident which is 
black. Scattered dots of white over the ventral surface recall what obtains 
on S. heragonatus though the spots are much smaller and much less numer- 
ous in the present species. 
Station. Latitude. Longitude. Depth. Temperature. Bottom, 
3433 25° 26’ 15” N. 109° 48’ W. 1218 fathoms 36.5° F. Br. M. bk. Sp. 
