144 
I! 
Gonostoma gracile GUNTHER, Ann* Tag. Hat. Hist., ser.5, vol.2, 1878, p.187 
Sea of Japan, in 345 to 2425 fathoms? Hep. Voy. Challenger, vol.22, 
1887, p.174, pi.45, fig.c (types). - BRAUER, Deutsch. Tiefsee Exped. 
Valdivia, vol.15, Tiefsee-Fische, 1906, p*73 (reference). - NORMAN, 
Discovery Rep., vol.2, 1930, p.285 (types)• 
Cyclothone gracile GOODE and BEAU, Oceanic Ichth., 1895, p.101 (copied). 
Keostoma grac ile COLLETT, Bull. Soc. Zool. France, vol.21, 1896, p.96. 
Depth 7 3/4 to 8 l/3; head 4 3/5 to 5, width *5So 3. to 3 1 / 5 . Snout 
4 3/5 to 5 in head from snogut tip? eye 4 l/2 to 5, subequal with snout, 
slightly greater than int 02 *orbital in young to 1 l/8 in interorbital in age; 
maxillary extends 2 3/4 to 3 l/3 in eye diameters behind eye, length 1 l/s 
to 1 1/5 in head from snout tip; inter orbital 4 l/2 tb 5 2 / 3 , low, depressed 
concavely medianly. Gill rakers 7 or 8 + 12, slender, lanceolate, long as 
eye; gill filaments 3 /5 gill rakers. 
Luminous organ below eye center but slightly longer than pupil diameter, 
narrowly ovoid, directly above upper maxillary edge; upper literal series of 
photophores 8 between pectorals and ventrals of which fifth and eighth well 
elevated equally.high above general course of series, 3 between ventral and 
anal; lower or ventral series 5 before pectoral base then 10 to ventral, 5 
between ventral and anal and then 15 to 22 to caudal base. Below each photo- 
■chore of upper lateral series larger whitish luminous body as 7 or 8 between 
pectoral and ventral with 3 more behind ventral. Usually 2 luminous whitish 
bodies at lower rudimentary caudal rays. 
D. Ill, 10, first branched ray 1 2/5 to 1 l/2 in total head length; no 
adipose fin; A. Ill , 26 to III , 28, first branched ray 2 to 2 3/5; caudal 
1 2/5 to 1 3/5, well forked, lobes slender, pointed and lower longer; least 
