The first pair about under posterior end of PVOo, rather close together. Second to fifth 

 pairs somewhat more widely divergent, forming equally spaced and roughly parallel 

 straight lines from ventral view. PO,i widely divergent, located somewhat more than an 

 organ diameter in front of base of outer pectoral ray. Five VO. VO, rather close together, 

 posteromesad to inner ventral ray. VO2 markedly elevated forming, with the next two 

 organs, evenly spaced descending or convergent lines. VO, and VO.-, about as widely 

 spaced from midline as VO,. VO,^ just anterolaterad to anus. Three SAO forming an 

 evenly spaced, almost straight and strongly oblique, isolated series. SAO, very slightly 

 behind, or even over, V0:„ about twice as close to lateral line as to anal base. Seven AOa 

 forming a continuous sigmoid curve with the Pol. AOa, slightly elevated, separated from 

 second by a somewhat enlarged interspace. Second to fifth organs forming a slightly 

 curved line, the concavity directed upward, penultimate and ultimate organs progres- 

 sively elevated toward the Pol, which lies about on the vertical of the end of the adipose 

 base and is markedly closer to lateral line than to ventral body margin. Five AOp, evenly 

 spaced in a straight series. Pre 3 + 2 or 4 + 2, separated from last AOp by an interspace 

 equal to about 0.4 depth of caudal peduncle. The first three or four Pre very closely spaced, 

 the last interspace markedly larger and the penultimate one larger still, the final organ 

 lying somewhat behind end of hypural and somewhat more than its own diameter below 

 lateral line. Well developed luminous organs displaying a somewhat spongy character are 

 widely scattered over the head and the body. Particularly well defined or prominent ones 

 occur below the lower PVO, Bu, VLO, each of the SAO and in the interorbital space. No 

 indication of any well defined glands among the procurrent rays of the caudal fin. The 

 body of this fish has very much the same general character as that of many large lampa- 

 denas. That is, where the scales are lost a pale pinky grey area is surrounded by a broad 

 brownish band marking the scale pockets and giving the entire fish a lattice work appear- 

 ance. 



Probably in life a luminous gland was borne on the posterior part of every scale 

 pocket. 



Bolin did not mention a Ce photophore, but Fraser-Brunner did. On the several specimens 

 in excellent condition before me, what may be interpreted as a Ce lies just above the anterod- 

 rosal insertion of the operculum and about over PO,; this organ, however, is very similar to the 

 small, weakly formed and easily lost patches of luminous tissue present on most scale pockets; 

 it is differentiated primarily in having a very narrow black margin not visible on other 

 patches. Also, Bolin did not mention the VLO, where Fraser-Brunner did, correctly located it 

 about midway between lateral line and pelvic base. A character not mentioned by either 

 author is that the photophore are mostly kidney-shaped, the concavity directed downward; the 

 ventral margins are usually more heavily bordered by dark pigment than the upper margins. 



Although Bolin considered only 1 Pol to be present, Fraser-Brunner interpreted two; the 

 latter opinion is herein accepted. The arrangement of the 2 Pol is variable; usually they are in 

 a straight, oblique line with the elevated last, or last 2, AOa; occasionally PoU is either 

 slightly behind that line but above the level of Pol, or is on the line and slightly below the level 

 ofPoh. 



The pectoral fin of a few specimens (43-49 mm) reached to SAO,, but on one larger 

 specimen (86 mm) it reached only to VO2. Unbroken pectoral fins of larger fishes did not extend 

 beyond VO,, usually to about over pelvic base. 



Size: To about 120 mm. 



Least depth of capture: To 200 m at night. 



Distribution: Probably occurs circumglobally in a restricted area between about 40° and 

 50° S (Fig. 206). The hiatus in distribution in the southern Atlantic and Indian Oceans is no 

 doubt due to lack of collecting effort in those areas. All but two collections shown in Fig. 206 

 were taken by the USNS ELTANIN during the United States Antarctic Research Program of 



219 



