Fig. Ill — Diaphus adenomus, male, 103.7 mm. 



Fig. 112 — Diaphus adenomus. Head of adult male, 107.5 mm. showing arrangement of 



luminous organs 



level midway between SAO1.2. Last few AOa increasingly elevated toward, and about equally 

 spaced with, Pol. Pre increasingly more widely spaced in a gentle arc, the chord of the arc 

 slightly shorter than the AOp-Prc interspace. 



Vn and Ant ofD. adenomus are unique in that both are much elongated, the latter organ 

 extending back over the orbital rim (Fig. 112); Dn rather small and not deeply recessed. 



Size: To 131 mm (Gilbert recorded "16 cm"; this may refer to total length). 



Least depth of capture: All specimens have been taken in hauls near the bottom from 

 about 460 to 640 m. 



Distribution: Known mainly from Pacific Ocean near Hawaii and off Japan. It has re- 

 cently been taken in the Caribbean Sea and in the Atlantic area near the Bahamas and off 

 Casablanca, Morocco (Nafpaktitis, 1974). 

 Discussion 



Nafpaktitis (1974), after comparing the holotypes, placed Diaphus anteorbitalis Gilbert 

 (1913) in synonymy with D. adenomous. I concur, having also compared the holotypes. 



119 



