NO. 3574 COPEPOD CRUSTACEANS — LEWIS 71 



face of frontal region. First segment slightly shorter than second, 

 broad proximally, narrow distally, distal half of anterior ventral and 

 anterior surfaces with approximately 24 lightly plumose setae and 

 setules. Second segment elongate, rodlike, Avith single, naked seta 

 from posterior surface in distal third of segment and 8 naked setae 

 from distal surface. Female antenna (fig. 266) 3-segmented, situ- 

 ated medial and posterior to antennule base. Antennal base in 

 close proximity to several flaphke projections of ventral cephalo- 

 thoracic cuticle. First segment small, subtriangular in ventral view, 

 with spike-shaped projection from posteriormost surface; second seg- 

 ment irregular, outer surface shorter than inner, proximal and distal 

 surfaces irregular. Third segment separable from clawlike terminal 

 process by break in heavy sclerotization, with small, setule-like acces- 

 sory process proximally, on knoblike projection of segment, and second 

 small, setule-like accessory process at region of break in sclerotiza- 

 tion. Male antenna (fig. 26c) with irregular first segment, inner 

 proximal surface with heavily sclerotized bifurcation; second segment 

 similar to that of female. Third segment fused with double-clawed 

 terminal process, bearing setide-like accessory process proximally 

 and second, long, setule-like process just proximal to proximalmost 

 claw and arising from slight indentation behind minute, flaplike 

 cuticular projection. 



Female and male mandible (fig. 26e) 4-parted; first part broad 

 proximally, tapered distally, with flexible joint between first and sec- 

 ond parts. Second part short, tapered slightly; third part elongate, 

 approximately equal to combined lengths of first 2 parts. Fourth part 

 short, flattened distaUy, inner edge of flattened portion with 13 den- 

 ticulations. Female and male postantennal processes (figs. 26c, d) 

 consisting of heavily sclerotized plate lateral and slightly posterior 

 to antennal base, with large, spike-shaped projection from lateral 

 surface and small, spike-shaped projection from inner posterior siu"- 

 face; 3 minute nodules present, 2 on plate, third posterior to plate, 

 each with at least 2 hairlike processes. Male with small, flabby, 

 conical projection just medial to inner surface of postantennal process, 

 on ridge of heavy sclerotization extending from lateral anterior margin 

 of cephalothorax to antennal base (fig. 26c). Female and male postoral 

 process (fig. 26c) large, spinelike, female with small spine arising from 

 inner proximal surface, process absent on male. Female and male 

 maxillule (fig. 26c) nodular, with setule distally. Female with pair 



Figure 26. — Gloiopotes hygomianus Steenstrup and Lutken, 1861, ventral view: a, left 

 antennule; h, female left antenna; c, male left antenna and postantennal process; d, fe- 

 male right postantennal process; e, oral region, left side showing mouth cone, mandible 

 (mdbl), maxillule (ma-1), postoral process, maxilla base (ma-2), and postoral adhesion 

 process (pa);/, left maxilla; g, female right maxilliped; h, male left maxilliped; t, sternal 

 furca. 



