Description 



D. 14 (15); A. 20 (19-21); P. 15 (14-16); AO 15 (14-16); gill rakers 6 (5-6) + 1 + 15(14-16), 

 total 22 (21-23); vertebrae 37-38. 



PO-, elevated to above level of pelvic base. VO series level. AO series in a very slightly 

 curved and ascending line to about over end of anal base, where the last 4 or 5 photophores 

 drop noticeably. Two Pre about a photophore diameter apart. Exposed margin of lateral line 

 scales notched at center with weak crenulations above and below. 



Supracaudal and infracaudal glands of one or two small, somewhat triangular luminous 

 scales; none of the 12 specimens (58-69 mm) examined bore glands on both surfaces of the 

 caudal peduncle. 



Size: To 69 mm. 



Distribution and depth ofcapture: Presently known from 39° 30' S, 71° 15' E, where 85 

 specimens were dipnetted at night, and 3 were taken between and 1000 m (Becker, 1963a); 

 12 specimens dipnetted at 41° 01' S, 75° 00' E (R/V Anton Bruiin. Sta. 308A). 



Electrona risso 



(Cocco, 1829) 



Fig. 20— Electrona risso. male, 64.5 mm. From Andriashev (1962. p. 248, fig. 23\ 



Description 



D. 13-15; A. 19 (18-20); P. 13-16; AO 12 (10-13); gill rakers 8-9-^1 + 17-20, total 26-30; 

 vertebrae 33-34. 



Body short and deep, its depth slightly greater than a third of SL; head short, about 3 in 

 SL, and as deep as long. Upper jaw short, barely or not at all extending beyond hind margin of 

 orbit. Caudal peduncle short and deep, with depth nearly equal to length. SAO series in a very 

 broad, moderately steep angle, often in a nearly straight line. AO series slightly uundulating 

 near end of anal base; usually 3 AO behind end of anal base. 



Precaudal luminous glands unusual in electronin fishes; only the females bear these glands 

 as tiny white spots on both surfaces of the caudal peduncle; males bear no glands (Brauer, 

 1906; Andriashev, 1962). 



Size: To about 90 mm. 



Least depth ofcapture: At surface at night in southeastern Pacific; to 170 m at night in 

 northeastern Pacific (time not given). 



Distribution: Northern Pacific Ocean, Mediterranean Sea, northwestern Atlantic Ocean, 

 Gulf of Guinea, South Africa, tropical Indian Ocean, and near New Zealand. Kubota and 



rio 



