Electronini subgenera Protomyctophum and Hierops, and in genera Benthosema and 

 Diogenichthys. Five PO, the third and fifth slightly but distinctly elevated. Five VO, the first 3 

 successively elevated in a pattern similar to those of the genera Lobianchia and Diaphus; last 

 2 VO essentially on the same level and well below VO3. 

 One species is recognized. 



Lampanyctodes hectorisCGiinther, 1876) 



Fig. 147 — Lampanyctodes hectoris, male, 60.5 mm. 



Description 



D. 13-14; A. 15-16 (14-17); P. 13 (12-14); AO 8 (7-9) + 6(4-7), total 13-14 (12-15); gill 

 rakers 10-11 + 1 + 20-21 (19-22), total 30-31 (29-33); vertebrae 37 (36-39). 



Three SAO in a straight, equally spaced line about in series with VO5. No AOa elevated; 1 

 Pol; 5 (4-6) Pre; all photophores well below lateral line. Dorsal and anal bases about equal in 

 length. Pupil very small, less than diameter of lens. 



Size: To about 70 mm. 



Least depth of capture: To 220 m at night off South Africa. 



Distribution: This species is known from off South Africa, New Zealand, and Australia, 

 and is probably circumglobal near the southern boundary of the Subtropical Convergence; it 

 has not yet been reported from the eastern Pacific Ocean. 



Discussion 



Lampanyctodes hectoris, an infrequently reported species, is poorly described. The de- 

 scription of the type is inadequate in that neither photophores nor luminous glands are men- 

 tioned (Giinther, 1876: 471). Gilchrist (1905), in describing this species as Scopelus argenteus 

 from off South Africa, presented a more complete description. Fraser-Brunner (1949), in 

 characterizing the genus Lampanyctodes , added further details but erred in stating that the 

 procurrent caudal rays were "soft" and spine-like when they are distinctly stiff. He further 

 erred in stating that aside from the small supracaudal and infracaudal luminous glands no 

 luminous glands appeared elsewhere. 



In addition to the three or four small luminous scales of the caudal glands, weakly de- 

 veloped, small and fragile, luminous scales are below PVO, , posteroventrad to PLO, below 

 VLO, and below most if not all AOa photophores, but apparently not below those of the AOp 

 series. There are also one or two rows of very small luminous scales under most of the Pre 

 photophores. Similar scales are present at bases of most dorsal procurrent caudal rays behind 

 the supracaudal gland, possibly on each scale pocket between end of dorsal base and origin of 

 adipose base, between origin of dorsal base and occipital region of head, and at bases of most 

 dorsal fin rays. 



Since detailed counts and measurements for L. hectoris are not available in the literature, 

 correlated counts for dorsal and anal fin rays, AO photophores, and gill rakers (Table 26), and 

 a list of body proportions are offered, based on material from near South Africa. 



158 



