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 nudlength, 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 tlie line lies another. 



Intense black; fins lighter toward the outer edges. 



station. Latitude. Longitude. Depth. Temperature. Bottom. 



3402 0° 57' 30'' S. 89° 3' 3u" W. 421 fathoms 42.3° R. glob. Oz. 



Myctophum aurolaternatum sp. n. 



Plate L V. fig. 3. 



Br. r. 9; D. 13 (12-14); A. 23-24; V. 9 ; P. 14 ; LI. 45-47; Ltr. 3 + 1 

 + 4. 



Moderately elongate, slender and compressed, depth one fifth of the 

 length to the ba.se 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 



