90 MEMOIRS OF THE CARNEGIE MUSEUM 



Color dark brown, apparently deeper at base of caudal; cheeks, mandible 

 and snout whitish in spirits, probably translucent in life. 



Two small cotypes from the same station as the type and one from Station 

 4977, 33° 23' N., 135° 37' 40" E., 544 fathoms, but probably taken nearer the 

 surface. Type deposited in the U. S. National Museum. 



Named for Shigeho Tanaka of the Imperial University at Tokyo, for his 

 valuable contributions to the ichthyology of Japan. 



18. Diaphus glandulifer sp. nov. (Plate XI, fig. 2.) 



Type 58 mm. long without the caudal fin, from Station 5058, Suruga Gulf, 

 taken with an intermediate net hauled at 300 fathoms. 



Differing from all known species of the genus in the extensive development 

 of the glandular organs of the photophores. In other species, only one is 

 present, attached to the suprapectoral, while in the present species, glands are 

 attached to aU the photophores of the upper series and to the majority which 

 are intermediate in position between the upper and the ventral series. A round 

 pre-orbital above the nostril, directed forward, and a conspicuous suborbital 

 under middle of eye. No inferior pre-orbital. 



Measurements in hundredths of length to base of caudal: Length of head 

 32; diameter of eye 8; width over middle of orbits 9.5; length of snout 4; length 

 of maxillary 23; oblique length of cheek 13; depth of body 21; depth of caudal 

 peduncle 9; predorsal length 45; base of dorsal 19; preanal length 63; base of 

 anal 18; length of pectorals 15; length of ventrals 23. 



Dorsal rays 15 (including rudiments, the last ray cleft to base); anal rays 

 15 (last ray cleft to base); pectoral rays 12 or 13; ventral rays 8. Scales of lateral 

 line 34. 



Snout short, bluntly and evenly rounded; pre-opercular margin obhque, the 

 maxillary scarcely widened posteriorly, almost reaching pre-opercular margin, 

 twice as long as snout and orbit. Gill-rakers 10 + 19, the longest six hundredths 

 of the total length without caudal. Origin of dorsal over base of ventrals, its 

 last ray above the vent. Adipose fin over last anal ray. Pectorals short, 

 barely attaining the base of the ventrals, which pass the origin of the anal. 



Photophores.— A roundish pre-orbital in a pit of the dorsal side of the nostril, 

 extending mesad nearly to the median crest; lower pre-orbital wanting. Sub- 

 orbital very sharply defined, invariable in shape and position; it is large, 

 roundish in outline, encroaches on lower part of eyeball, and hes in or slightly 

 behind its vertical diameter. It evidently corresponds to the detached point 



