362 U.S. NATIONAL MUSEUM BULLETIN 236 



as long as exopodite, styliform, nude. 2nd and 3rd endopodal seg» 

 ments fused to form bluntly pointed digit. 



Legs 2 to 4 with 3-segmented exopodite and 2-segmented endopo- 

 dite. All bases with fine external seta. The various details of the 

 legs can be taken from figures 143b-d and from the setal formula: 



Leg 5 (fig.l43e) big, foliaceous. Baso-endopodite very slightly 

 shorter than exopodite, with 4 setae; external lobe big, with fine seta. 

 Exopodite triangular, with 3 short, plumose setae. 



Color greenish, with chitinized spines on back yellowish. The 

 specimen carries a ball composed of 4 big eggs. 



Adult male, total length 0.59 mm.; greatest diameter 0.14 mm.; 

 length of longest f ureal seta 0.17 mm. 



General shape of body slenderer than in female; the principal points 

 of difference are: 



1. Though the general pattern of armature is nearly identical, there 

 are small differences in the length of the spines, as appears from a 

 comparison of figures 144a and 142a; the median spine on the cephalic 

 somite does not point as far backward as in the female. 



2. Abdominal somites 1 and 2 separate; epimeral plates scarcely 

 produced laterally; ventral border of abdominal somites 2 to 4 with 

 some spinules. 



3. Antennules subchirocerate, 6-segmented: segment 1 with haired 

 tubercle; segment 2 with small, blunt tooth; segment 4 strongly 

 swollen, with short conical process, bearing aesthetasc and 2 setae; 

 apical 3 segments fused, in this specimen clasped against 4th and 

 almost hidden in its concavity. Setation represented in figure 143/. 



4. Antenna, oral appendages, and legs as in female, with exception 

 of leg 3 and leg 5. Leg 3 (fig. 143^) different from that of female by 

 stronger development of exopodite. External marginal spines of 

 exopodal segments 1 and 2 strong; on 3rd segment there are 2 slender 

 and long external marginal spines, spine and seta at apex, and 2 inter- 

 nal setae. Lang (1948, p. 1424) gives the number of spines at the 

 external margin of this segment as 3. Leg 5 (fig. 143A) small, baso- 

 endopodite practically absent, without setae or spinules. External lobe 

 well developed, with fine seta. Exopodite small, V/2 times as long as 

 wide, quadrate, with 3 marginal, plumose setae. Armature of genital 

 plates (leg 6) composed of 2 setae placed at slightly elevated part of 

 distal wall of 1st abdominal somite (fig. 143i^). 



Remarks. — In the shape of the cephalic somite, there is some 

 difference between Laophonte armiger as described by Gurney (1927, 



