186 PROCEEDINGS OF THE NATIONAL MUSEUM vol. us 



mm.) may also be due to this cause. Line of small denticles following 

 outside of each distal edge of anal segment. 



Caudal rami more than 4 times as long as wide. In addition to 4 

 terminal setae mentioned by Wilson, a small seta borne dorsally al 

 short way from tip on outer side and a longer one in usual position; 

 near inner corner. Rudimentary basal element on outer side was; 

 not observed. 



Antennules 7-segmented but division between first and second 

 segments indistinct. Several setae with transverse rings of thicken- 

 ing; ciliation not observed on any. 



Details of appendages between antennules and swimming legs could 

 not be determined. (Figure 8d of the maxilliped is approximate only 

 and absence from it of features which might be expected should not 

 be considered evidence that they do not occur.) Antenna 4-seg- 

 mented; inner distal corner of its penultimate segment bearing a 

 slender curved seta and other setalike elements; the terminal with 

 curved and normal setae. The appendage may thus be presumed to 

 resemble that of adhaerens or subadhaerens . 



Swimming legs as in figure 8e-h; armature and basic ornamentation 

 same as that given for adhaerens (p. 178) except for possible lack of a 

 seta on outer side basipodite of fourth legs. (Wilson's "fourth leg," 

 1937, fig. 5, is clearly a reversed view of the first and thus bears little 

 resemblance to the actual appendage.) ''Spines" on outer distal 

 corners of first and second endopod segments not true spines, as 

 Wilson's description and figures would imply, but unarticulated 

 projections of these podomeres. Only 2 of the "row of four short 

 spines around the tip" of third endopod segment in first leg discern- 

 ible and these — here termed spinules — occur similarly on second leg. 



Contrary to Wilson's statement (1937, p. 208) and his figure 6, a 

 seta occurs on proximal segment of fifth legs. Spinules on distal 

 podomere not extending further along outer margin than base of first 

 spine. 



Sixth legs represented by 3 setae (not 2) near oviducal openings; 

 appendage apparently like that of adhaerens. 



Figure 7 '.■ — Hemicyclops subadhaerens, new species, male: a, Tip of left mandible, ventral 

 (posterior) view (flattened), b, Right maxillule, dorsal (posterior) view, c, Left maxilla, 

 ventral (posterior) view, d, Right maxilliped, ventral (posterior) view, e, Left first 

 swimming leg with coxal plate, ventral (anterior) view. /, Left second swimming leg 

 with coxal plate, ventral (anterior) view, g, Left third swimming leg with coxal plate, 

 ventral (anterior) view, h, Left fourth swimming leg with coxal plate, ventral (anterior) 

 view, i, Left fifth leg, dorsal view. ;', Right sixth leg, ventral view, k, Left caudal 

 ramus, dorsal view. Scale D (fig. 2) applies to d-h; E to c and i-k; and F to a-b. 



