BY J. DOUGLAS OGILBY. 37 



■circular, photophore between the upper portion of the anteorl)ital 



photophore and the an tero-superior angle of the eye on either side, 



))ut separated from both b}^ a narrow interspace. Cleft of mouth 



oblique and slightly curved, the maxillary nearly reaching to the 



angle of the preopercle. Eye large, with well developed adipose 



lid, its diameter f of the length of the head. Interorbital region 



convex, its width rather more than the diameter of the eye; the 



supraorbital bone forming an acute overhanging ridge. Opercle 



notched posteriorly, its lower portion the longer, but not produced 



backwards so far as the acute subopercle. Origin of the dorsal 



slightly in advance of the vertical from that of the ventral, which 



is directly below the base of the first articulated ray, which is 



the highest, a little longer than the base of the fin and f of the 



length of the head; base of last dorsal ray slightly in advance 



of the origin of the anal : adipose fin narrow, tapering, its length 



^ of the diameter of the eye, inserted midway between the dorsal 



and the base of the caudal and a little behind the vertical from 



the last anal ray: anal fin shorter and lower than the dorsal, 



its lenojth 4 of its distance from the caudal : ventral with 



eight rays, the space between its origin and the tip of the 



mandible | of its distance from the base of the caudal and slightly 



anterior to a point equidistant from the base of the adipose fin 



and the front margin of the eye; its length is 4 of that of the head 



and it does not nearly reach to the anal: pectoral pointed, with 



eleven rays, scarcely half the length of the head and not quite 



reaching to the vertical from the origin of the ventral: caudal 



forked, about ^ of the total length, the least depth of the peduncle 



2i in the depth of the body. Scales smooth, those of the lateral 



line somewhat enlarged and notched posteriorly, with the tubes 



very conspicuous; lateral line without anterior curve. In addition 



to the anteorbital and its supernumerary photophores there are 



two luminous spots on the opercle, one between the posterior half 



of the eye and the upper jaw, three on each side of the mandible, 



and one inside the mouth below the maxillary one; there is also 



a large luminous spot above the base of the pectoral. The 



arrangement of the body photophores is as follows — five thoracic, 



