71 



two-tliirrls of its longth. Eyp very large, reaching to the upper 

 surface of the head, its diameter one-half the length of the head ; 

 several tubular lobules border the eye posteriorly ; luminous 

 organ partially free, reaching to behind the eye, and four-fifths 

 of its diameter. Snout very short, convex, not projecting beyond 

 the mouth. Interorbital space flat, broad, three-fourths of the 

 diameter of the eye. Nostril large, not separated from the 

 eye by an osseous interspace. Jaw^s equal ; maxilla slender 

 anteriorly, becoming abruptly expanded in its pooterior third, 

 and reaching to behind the vertical from the centre of the eye. 

 All the bones of the head entire, scaleless, and finely sculptured; 

 on the upper surface most of the bones are divided by naked 

 tubiferous interspaces ; clavicle very large, semicircular ; 

 supraclavicle and jjost-temporal elongate, arcuate. Bands of 

 villiform teeth on the jaws and palatine bones ; vomer and 

 tongue toothless. Dorsal spines weak, the last small, and 

 separated from tlie fourth by a considerable interspace ;* soft 

 dorsal rather higher than the spinous, with a distinct, though 

 small and weak, spine : anal similar to soft dorsal, with two 

 small inconspicuous spines : ventrals well developed, four- 

 sevenths of the length of the head, and five-sevenths of the 

 distance between their origin and the vent : pectorals pointed, 

 equal in length to the ventrals : caudal elongate, and deeply 

 forked, four and four-fifths in the total length. Least height 

 of caudal pedicle three and two-thirds in the height of the body. 

 Abdomen with a distinct serrated ridge. Scalesf small, each 

 one with several rows of strong, though minute, spines, those 

 on the posterior margin being the longest ; base of caudal fin 

 scaly. The lateral line commences near the upper angle of 

 the post-temporal, and runs parallel to the dorsal pi-ofile during 

 its entire length.! Colors — Purplish-brown ; luminous organ 

 externally bright yellow with a raised black border, internally 

 black : all the fins much darker than the body : soft dorsal 

 with a white basal band gradually narrowing from the front ; 

 all the vertical fins narrowly margined with white. 



* The fifth spine has by some chance been omitted ia the otherwise 

 excelltnt figure in the Fische dkr Sudsee. 



t The scales have a great resemblance individimlly to those of Tetra- 

 gonuinis. 



X In Dr. Gilnther's figure this line is much too straight and commences 

 too far down ; Dr. Bleeker's is more accurate. 



