4a. Anal rays 19-20; total gill rakers 21 (19-22). Upper Pol under base of adipose fin; 2 or 3 

 AOp over anal base. Upper jaw extends well past hind margin of orbit H. atratum 



4b. Anal rays 23 (21-25); total gill rakers 18 (17-20). Upper Pol well before base of adipose 

 fin; 4 (3-5) AOp over anal base. Upper jaw extends only slightly past hind margin of 

 orbit H. reinhardtii 



Hygophum hygomi 



(Liitken, 1892) 



Fig. 2Z— Hygophum hygomi, male, 34.3 mm. From Becker ( 1965, p. 71, fig. 3). 



Fig. 24 — Hygophum hygomi, female, 47.6 mm. (Photophores retouched). 



Description 



D. 14 (13-15); A. 21 (20-22); P. 15-16; AO 6-7 + 6-7, total 13 (12-14); gill rakers 5-6 -f- 1 -H 

 15 (14-16), total 22 (21-23); vertebrae 36-37. 



VLO, SAO;i, and upper Pol at or very near lateral line. Pol series in a flatly oblique line 

 that passes through or before first AOa; SAOi over or before VO^; 2 or 3 AOp over anal base. 



Supracaudal glands of males small, undivided (2 mm long, 1 mm wide on a 49.5-mm 

 male). The glands bifurcate posteriorly, with short projections along bases of first two procur- 

 rent caudal rays; bifurcation capped with darkly pigmented tissue. Infracaudal glands of 

 females small, about half those of males of same size, more weakly developed and not bifurcate 

 or pigment-capped posteriorly. Glands evident in each sex at about 35 mm. 



Size: Females to about 60 mm, males to 50 mm. 



Least depth of capture: At surface at night. 



Distribution: H. hygomi is apparently circumglobal in southern waters and is also known 

 from the North Atlantic Ocean and Mediterranean Sea. In the southeastern Pacific it has been 

 taken off Chile between about 18°-34° S, 75°-95° W (Fig. 25). 



33 



