260 DEEP SEA FISHES. 



obliquely transverse ridges near the hinder edge of each facet, the outer of 

 which turns forward near the median ridge along which it slightly diverges 

 as it proceeds. Vent halfway from the snout to the anal fin. Scales 

 rather large, covering the body and the head from the nape to the luminous 

 organs and the mouth, apparently roughened over their surfaces by minute 

 spines or tubercles. 



Dorsal origin backward of tlie vent about one width of the ventral bases, 

 a little Avitliin the anterior third of the distance from the snout to the end of 

 the caudal. Ventrals inserted about midway from the dorsal to the head, 

 reaching a vertical from the first ray of the dorsal or little farther. Origin 

 of the anal halfway from the luminous organs of the head to the end of the 

 tail. Pectorals reaching to the middle of the ventrals. 



Largest individual six and one half inches in length. 



Blaclsi.sh, with slight reddish tinge ; fins blackish to light brownish or 

 whitish on different individuals ; cheek between the light disks (ej'es) and 

 the upper jaw steely blue or with a metallic lustre; light organs milk white 

 tinted with golden. 



Readily distinguished from Ipnops Miirmyi by a greater length in the 

 caudal region, a longer anal fin, a smaller number of branchiostegal rays, a 

 greater number of scales in the lateral line, and ventrals farther backward 

 and farther from the dorsal fin. 



The specific name is given in honor of Professor Alex. Agassiz. 



StatioD. Latitude. Longitude. Depth. Temperature. Bottom. 



3413 2° 34' N. 92° (j' W. 1360 fathoms 30° F. Glob. Oz. tlk. Sp. 



MYCTOPIIID.E. 

 Myctophum oculeum sp. n. 



Plate LVI. fy. 3. 



Br. r. 10 ; D. 14 (1.3-15) ; A. 15 (14-16) ; V. 8 ; LI. .35 ; Ltr. 2 + 1 + 4. 



Moderately elongate and compressed, depth more than one sixtli of the 

 total length. Head about one fourth of tlie length from snout to end of 

 caudal, more than half as wide as deep, somewhat pointed in front, some- 

 what convex on the forehead. Snout short, blunt, three fifths of the length 

 of the eye, convex on the top, with a pronounced median internarial keel. 

 Eye large, one fourth as long as tlie head, as wide as the intcrorbital space. 



