4 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 122 



dopod (fig. 14) small, 2-segmented ; 2nd segment with 3 setae. Leg 2 

 (fig. 15) exopod 3-segmented; each segment with a weU-developed 

 pigmented spine on outer distal corner; inner margin bearing a 

 strongly recurved seta armed with stout plumosities. Endopod 3- 

 segmented, armed as in the figure. Leg 3 (fig. 16) exopod 3-seg- 

 mented with well-developed bifm-cate spine representing 1st segment. 

 Endopod 3-segmented. Basal segment fused with coxopod and diffi- 

 cult to distinguish. Fourth leg (fig. 17) uniramose, armed as in 

 figure. Fifth leg projecting beyond outer distal corner of genital 

 segment to end of abdomen, bearing 3 plumose setae (1 basal, 2 

 terminal). Terminus of leg 5 (fig. 18) with strong spines. 



Egg strings uniseriate, 3.7 mm (3.3-4.2 mm) long, based on an 

 average of 7 specimens. 



Color in life bluish purple. 



Male. — Total length (including caudal rami) 9.28 mm (8.85-10.05 

 mm); greatest width (measured at widest part of cephalon) 3.75 mm 

 (3.45-4.05 mm) based on an average of 25 specimens. Body form as 

 in figure 19. Cephalon and thoracic segments ornamented dorsally 

 as in female. Thoracic segment bearing legs 4 with dorsal plates as 

 in female. Genital segment (fig. 20) rounded, 1.5 x 1.7 mm, slightly 

 longer than wide with 5th legs projecting from outer distal corners to 

 about middle of abdomen. Spinules on dorsal surface as indicated in 

 figure. Abdomen 2-segmented; 2nd segment twice as long as 1st, 

 both segments with dorsal spinules. Caudal rami as in female. 



Oral area in general as in female. Second antenna (fig. 21) with 

 terminal claw and accessory subterminal claw. Inner distal corner 

 of basal segment with adhesion area. Maxilliped basal segment (fig. 

 22) with sclerotized knobs as indicated in figure. Other cephalic 

 appendages as in female. 



Legs 1-4 as in female. 



Leg 5 (fig. 23) projecting posteriorly from genital segment, armed 

 with 1 plumose seta near base and heavy spines along inner edge to 

 tip as in figure. Leg about 2.2 mm long measured along inner edge 

 from origin to tip, extending to about middle of abdomen. Leg 6 

 (fig. 24) represented by an outer plumose seta and 2 inner spines near 

 junction of genital segment and abdomen. 



Remarks. — Gloiopotcs americamis can be separated from G. watsoni 

 and G. hvttoni by the presence of a spinose bulge along the lateral 

 margins of the genital segment of G. americamis. Also the outer 

 margins of the winglike plates of G. americamis are nearly parallel to 

 the anterior-posterior axis of the body while those of G. watsoni and 

 G. huttoni are at an angle of nearly 45°. 



This new species can be separated from G. ornatiis by the nature of 

 the spinose bulge along the margins of the abdomen of the female. 



