262 



DEEP SEA FISHES. 



Myctophum t3nriiciilimi sp. n. 



Plate J, fig. 5. 



D. 12-11 ; A. 19 ; V. 7 ; P. 13-12 ; LI. 39-41 ; Ltr. 2+1+4. 



Body compressed, elongate, very slender near the caudal fin, depth three 

 thirteenths of the length to the base of the caudal. Head narrow, deep, 

 three elevenths of the entire length to the bases of the caudal rays. Snout 

 short, half as long as the eye, blunt, prominent and slightly overhanging 

 the front of the mouth. Eye, large, twice the length of the snout, less than 

 one third of the length of the head, as wide as the interorbital space, one 

 half as long as the maxillary. Mouth large ; a vertical from its middle 

 passes through the middle of the eye ; maxillary extending backward of 

 the orbit about half the diameter of the eje. 



The fifth ray of the dorsal is midway from the snout to the base of the 

 caudal, and the eighth is above the first ray of the anal fin. The adipose 

 dorsal is above the hindmost three rays of the anal. The bases of the ven- 

 trals are forward of the dorsal. Pectorals small, reaching backward of the 

 bases of the ventrals. Caudal forked, pedicel long, narrow, slender, portion 

 between the adipose fin and the bases of the long rays of the caudal equal 

 to four fifths of the length of the head. 



Scales large, smooth, those on the lateral line larger. 



A single lantern occupies the middle of the interorbital space ; on each 

 side there are three lanterns in the branchiostegal series ; a minute one 

 lies at the angle of the mouth with a larger one just above it behind the 

 maxillary ; one is situated at the lower edge of the base of the pectoral, 

 another close above it forward of the upper ray of the fin and a third a 

 short distance below and forward under the opercular edge ; none visible 

 on the isthmus ; five between the isthmus and the ventrals ; four between 

 the ventrals and the anal ; on the flank about one scale-width above these 

 last a series of three the foremost of which lies above the base of the 

 ventral; a single one above the vent near the lateral line; eighteen between 



