272 DEEP SEA FISHES. 



Operculum thin, broad and short. Three pyloric cteca. Scale marks 

 present, but the scales apparently reduced to membrane. 



Dorsal short ; first ray probably long, at the end of the anterior fourth 

 of the total length ; base high forward, one third longer than the orbit. 

 Adipose fin rather long, above the hinder half of the anal. Anal in the 

 hindmost third of the length ; base twice as long as that of the dorsal, 

 separated from the bases of the longest rays of the caudal by about two 

 thirds of the length of the head ; fin deepest anteriorly. Caudal pedicel 

 deepening toward the bases of the rays ; fin deeply notched. Pectorals 

 narrow, low on the side, not reaching the bases of the ventrals. Ventrals 

 narrow, long, inserted about half way from the snout to the anal. 



In each of the branchiostegal series there are twenty of the luminous 

 organs ; at each side of the body the lower series of the light facets con- 

 tains eight at the side of the isthmus, nineteen between the isthmus and 

 the ventrals, twent^'-two to twenty-three between the ventrals and the anal, 

 and eleven from the origin of the anal to the base of the caudal ; and in the 

 upper series there are seventeen to nineteen from the gill opening to the 

 ventrals and twenty-two to twenty-three from the ventrals to the anal. 

 As in C. Sloani, there is a multitude of very small light organs, mere dots, 

 but similar to the large ones, amongst those of the two main series; for 

 instances, at each side of the bases of the pectorals in somewhat regular rows, 

 or in the groups of four, more or less, between the large series. A single 

 yellow (red) facet is situated between the eye and the hinder extremity of 

 the intermaxillary, and a single black one immediately below the forward 

 part of the eye (resembling that in Gonostoraa). 



Black ; tinted with gold on the flank and iris, with red on the sides of 

 the lower jaw and on the light facet back of the eye, and with greenish on 

 the anterior glands of the two main series ; fins brownish to blackish. 



This species appears to be shorter and stouter than Chauliodus Sloani Bl. 

 Schn., the barbel is more developed, and the luminous disks are not so 

 numerous; from the shoulder to the vent in each of the upper series there 

 are thirty-nine to forty light organs, of which seventeen are between the 

 shoulder and the ventral, and in each of the lower series there are sixty to 

 sixty-one, forty-nine of which are from the hyoid to the vent, or twenty- 

 seven to twenty-eight of which are from the hyoid to the ventral; but in 

 C. Sloani there are forty-four to forty-six from the shoulder to the vent, 

 nineteen to twenty of which are between the shoulder and the ventral, m 



