264 DEEP SEA FISHES. 
snout. Opercular bones thin, with an angular projection above the bases of 
the pectorals. Scales large, smooth, thin, subequal, deciduous. 
Dorsal origin forward of the total midlength, distant from the snout one 
and one half times the length of the head; base little more than half as 
long as the head; anterior three rays short. Adipose dorsal distant from 
the caudal base three fourths of the length of the head, above the hindmost 
two or three rays of the anal, narrow, acuminate. Pectorals narrow, two 
thirds as long as the head, reaching behind the bases of the ventrals. Vent 
below the hinder end of the base of the dorsal. Ventrals halfway from the 
pectorals to the vent, inserted below the third ray of the dorsal, reaching 
the base of the anal. Anal origin very little farther back than the last ray 
of the dorsal; basal length little less than that of the dorsal. 
There is a large irregular shaped luminous organ above the caudal pedi- 
cel and another below it. The small light organs are distributed as follows: 
on each side of the body there are two, possibly three in the branchiostegal 
series; one lies on the base of the pectoral, below it a short distance a 
second and above near the lateral line a third with it form a right line; 
from the isthmus to the base of the ventral there are four, and above the 
third of these there are two, the uppermost of which attains the level of the 
middle of the pectoral base; between the ventrals and the anal there are 
five and from the fifth a series of three leads up and backward to the lateral 
line; on each side of the base of the anal there are six and above the sixth 
near the lateral line lies a single one backward of which on the base of the 
caudal at the end of the line lies another. © 
Intense black; fins lighter toward the outer edges. 
Station. Latitude. Longitude. Depth. Temperature. Bottom. 
3402 0°57! 30'S: 89° 3/ 30” W. 421 fathoms 42.3° R. glob. Oz. 
Myctophum aurolaternatum sp. n. 
Plate LV. fig. 3. 
Br. r. 9; D. 18 :(12-14); A. 23-24; V.9; P.14; Ll. 45-47; Ltr. 3 + 1 
+ 4, 
Moderately elongate, slender and compressed, depth one fifth of the 
length to the base of the caudal, width three fourths of the depth. Head 
little less than one fourth of the total length, convex on the crown, narrow- 
ing slightly toward the throat. Snout short, hardly more than half as long 
