60 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 121 



Female free fourth pedigeroiis segment less than half the width of 

 cephalothorax, tapered sharply anteriorly and posteriorly from widest 

 point, at fourth leg attachment. Alae broad anteriorly, tapered (in 

 figured specimen) to narrow, sharply rounded posterior end tipped 

 with single spmule; alae rounded posteriorly in some specimens, sub- 

 rectangular in others. Alae extending posteriorly, over anterior 

 region of genital segment, bearing several spinules dorsally; medial 

 lateral surface semimembranous. 



Female genital segment (fig. 22e) indistinctly separable from fourth 

 pedigerous segment, broad medially, with large, lobate projection 

 from each lateral posterior surface, lateral surface of segment rough- 

 ened adjacent to lobes. Genital segment bearing strong, heavily 

 sclerotized fifth legs projecting from ventral lateral posterior surface, 

 at base of lobate projections; legs extending posteriorly and laterally 

 to end of abdomen, with row of spinules on distal ventral surface and 

 on indentation in distal medial region. 



Female abdomen 2-segmented, distinctly separable from genital 

 segment. First segment subrectangular, approximately half the 

 length of elongate second segment; second segment mth club-shaped 

 swelling on dorsal suiface. Both segments mth numerous spinules. 

 Caudal rami elongate, appearing 2-parted although "division" an 

 indentation in lateral surface (rami not 2-segmented as indicated by 

 Heegaard, 1962, p. 174). Distal lateral surface of rami mth single 

 spine, distal ventral surface mth 1 and distal sm'face with at least 3 

 spines; several spinules present on remaining ramal surface (not 

 figured) . 



Cephalothorax of male (fig. 226) similar to that of female although 

 number and arrangement of spinules on dorsal surface different. Alae 

 of free fourth pedigerous segment (fig. 22d) primarily lateral expan- 

 sions, without narrow, posterior extension present in female; "with 

 semimembranous trailing edge. Genital segment (fig. 22/) distinct 

 from fourth pedigerous segment, ovoid in outline, ^^dthout lobate 

 posterior projections. Heavily sclerotized fifth legs projecting from 

 posterior ventral surface, mthout distal medial indentation present 

 in female, with small spinules and bearing 3 spinules from distal sur- 

 face. Abdomen of both sexes similar in general outline although male 

 without club-shaped dorsal swelling of second segment. Caudal 

 rami similar to those of female altliough inner terminal process longer. 



Female and male antennule (fig. 23a) 2-segmented, first segment 



Figure 23. — Gloiopoies huitoni (Thomson, 1889), ventral view: a, left antennule; b, female 

 left antenna; c, male left antenna and postantennal process (pap); d, female left post- 

 antennal process (* = see text);^, female oral region, left side showing mouth cone, man- 

 dible, maxillule, and postoral process; /, male, same, right side; g, right maxilla (pop= 

 postoral process; a = adhesion pad, not present in male); h, left maxilliped. 



