MYCTOPHUM OCULEUM. 261 
Mouth wide, two and two fifths times as long as the eye; intermaxillary 
very slender, forming the entire upper edge of the mouth; maxillary 
extending one diameter of the eye backward of the orbit. Opercles large, 
elongate, membranous in the greater part of their extent. 
Dorsal origin half way from the snout to the base of the caudal. 
Origin of the anal below the tenth ray of the dorsal. Adipose fin above the 
hindmost rays of the anal. Ventrals little backward of midway from the 
isthmus to the first ray of the anal. On one specimen the ventrals were 
never developed. 
Scales large, smooth, those of the lateral line wider. 
Of the luminous organs, the lanterns, there is one on the interorbital 
area immediately behind the rostral keel ; there are three in the branchios- 
tegal series the hindmost being lower than the other two; there is one 
behind the end of the maxillary, below which at the angle of the mouth lies 
a smaller one; there is one upon the base of the pectoral, above and for- 
ward on the lateral line another, and below and forward from the pectoral 
a third; on the lateral line the second of its series lies above and backward 
from the ventral base, the third above the fifth ray of the anal, the fourth 
above the hinder extremity of the base of the anal, and the fifth a little 
above the median line on the base of the caudal; there are four between 
the isthmus and the ventrals, of which the third is farther out than the 
others; from the ventrals to the anal there are three ; at the side of the 
anal there are five or six, the hindmost one being farther out; at the lower 
part of the side of the caudal pedicel there are eight, the last situated up a 
short distance on the caudal base; behind the end of the operculum half 
yay to the ventrals there is a single lantern; and above the axil of the 
ventrals on the lower part of the side lies the foremost of a series of five 
of which the fourth is near the first, and the fifth near the next to the hind- 
most ray of the anal. A large elongate organ apparently luminous extends 
from the adipose fin to the caudal and a longer one from the base of the 
anal backward to the tail. 
Black ; fins lighter; scales lustrous. 
Station. Latitude. Longitude. Depth. Temperature. Bottom. 
~8358 6° 30’ N. 81° 44’ W. 555 fathoms AI QURE Gn. 8. 
3366 5° 30’ N. 86° 45’ W. LOGi 37° FF. Y1. glob. Oz. 
» 3381 4° 56’ N. 80° 52! 30" W. Migr 35.8° F. Gn. M. 
3387 7° 40’ N. 79° 17! 507 We Li, we 56.2° F. Fne. gy. S. 
2619 (Hyd.) 7° 31’ N. 78° 42/30" W. 1100. « 36.5° F. 
3388 GaN: 79° 48’ W. LIGSy 36.2° F. Gn. glob. Oz. 
