12 MEMOIRS OF THE CARNEGIE MUSEUM. 



space in anal series; Precaudales (Pre) one, close to lateral line on level of postero- 

 lateral spot; Supra-anales (SAO) three, the upper close to lateral line, the two 

 below out of line, a very obtuse angle at the middle one; Supraventral (VLO) 

 wanting; Opercular (OP) two, close on edge of preopercle, both below upper base 

 of pectoral; Mandibular (Brr) three, in a right line; Antorhital (Antorb.) none, no 

 suborbital or postorbital sj)ots. 



Dorsal fin high, its first ray equal to depth of body below it; adipose fin small; 

 caudal deei)ly forked, its lobes 1.4 in head; anal fin rather long, falcate, its edge 

 concave, its longest ray five-sixths height of dorsal, 1.8 in head; pectorals very 

 long, reaching anal, as long as head; ventrals inserted just before dorsal, 2.4 in head. 



Color blackish, paler below the luminous spots ringed with black. 



A single example, 4.25 inches in length, was found in good condition by i\Ir. 

 Grinnell in the market at Honolulu, perhaps a spewing from some large fish. 



The species is reflated to Myctophum braueri as described by Gilbert (Myc- 

 tophum reinhardti Liitken) but has the anal shorter and the anal photophores fewer. 



According to Gilbert (The Lantern-fishes, Mem. INIus. Comp. ZooL, XXVI, 

 1908, p. 219), Myctophum reinhardti Liitken is based on two examples. The one 

 figured by Liitken with fourteen dorsal rays and twenty-four anal rays is regarded 

 as the tyi^e. This is from the tropical Atlantic. Gilbert observes: "Liitken's 

 fin-counts were taken from the second specimen, which belongs to a species which 

 remains undescribed." It is very likely identical with M. hoUandi. 



Centrobranchus Fowler. 



58. Centrobranchus choerocephalus Fowler. (G., p. 594.) 

 Pelagic, widely distrilnited. 



59. Centrobranchus gracilicaudus Ciilbcrt. (G., p. 595.) 

 Pelagic, off Niihau. 



DiAPHUS Eigenmann and Eigenmann. 

 GO. Diaphus urolampus Gilbert and Cramer. (G., p. 591.) 

 Pelagic, off Kauai. 



01. Diaphus chrysorhynchus Gilbert and Cramer. (G., p. 592.) 

 Pelagic, off Oahu and Molokai. 



02. Diaphus adenomus Gilbert. (G., p. 592.) 

 Pelagic, Kaiwi Channel. 



Lampanyctus Bonaparte. 



03. Lampanyctus omostigma Gilbert. 



Pelagic, southeast of Hawaii. 



