Benthosema 



Goode and Bean, 1896 



Vn absent; Dn present. PVO series nearly horizontal. Five PO, none elevated; 5 VO, the 

 second elevated and displaced forward. One Pol; 2 Pre, the upper one at lateral line and distant 

 from the lower. 



Key to species o( Benthosema 



la. SAO series in a flatly oblique, straight or slightly angulate, line. VO2 slightly but dis- 

 tinctly elevated and displaced forward by no more than its diameter B. glaciale 



lb. SAO series notably angulate. VO- highly elevated and displaced forward to nearly over 

 VO, 2 



2a. Suborbital organ (So) present about under high margin of pupil. SAOi about on level of 

 SAOo. PLO nearer pectoral base than to lateral line. VLO about four of its diameters 

 below lateral line, about on a line from PLO to SAO^ B. suborbitale 



2b. So absent 3 



3a. SAO, below level of SAO,, far below a line through PLO, VLO and SAO,. PLO about two, 

 VLO two or three, diameters below lateral line. OP2 only slightly above level of lower 

 margin of orbit B.fibulatum 



3b. SAO, above level of SAO2, the two on an ascending line with VLO and PLO. OP, high, 

 about on level of pupil B.panamense 



Benthosema glaciale 



(Reinhardt, 1837) 



Fig. 33 — Benthosema glaciale, sex unknown, 40.0 mm. From the Norweigan Sea. 



Description 



D. 13 (12-15); A. 18 (17-19); P. 11 (10-12); AO 6 (5-7) + 7 (5-8), total 13 (11-14); gill rakers 4 

 (4-5)+ 1 + 11(10-12), total 17 (15-18); vertebrae 36 (35-37). 



VLO about midway between lateral line and pelvic base, about on level of PVO and 

 SAO, .2. VO2 but little elevated, about over middle of VO,..) interspace. PLO nearer pectoral 

 base than to lateral line. SAO series in a flatly oblique, nearly horizontal and nearly straight 

 angle; SAOj slightly below a line from SAO,.:t. 



The supracaudal gland is small, translucent (in preservative), elongate, and heavily bor- 

 dered with dark pigment, beginning just before first procurrent caudal ray. The infracaudal 

 gland is smaller, of two coalesced parts, and also heavily bordered with dark pigment. Of the 



40 



