﻿256 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 102 



one another; inner and outer margins set with very short, scattered 

 spinules. End of rami bearing terminally a short, broad, spiniform 

 seta and three longer, nonplnmose setae, one lateral and one short 

 ventral seta. 



Second antenna (pi. 13, fig. 3) with spinous process of basal seg- 

 ment well developed; third segment more or less distinct; terminal 

 claw comparatively weak and little curved, with a slender seta at 

 its base. Prehensile lateral hook (pi. 13, fig. 4) short, with broadened 

 base, not strongly curved; setae of papillae branched (pi. 13, fig. 4, a). 

 Mouth tube as described for the genus, well developed and seeming 

 large in proportion to the comparatively small size of the copepod. 



First maxilla (pi. 13, fig. 5) having the inner piece well extended 

 distally and the outer portion with a small posterior extension not 

 reaching beyond the curved basal part of the inner piece ; the longest 

 of the three papillary setae (pi. 13, fig. 11) very broad and partially 

 divided near its base, the other two very slender, the longer consisting 

 of two unequal segments. The anterior ventral accessory process 

 (pi. 13, fig. 6) located near the distal inside end of the imier piece 

 of the first maxilla, a small spine terminating a membranous fold 

 that nins backward about half the length of the maxilla (this 

 membrane not shown in pi. 13, fig. 6) . 



Posterior claw of second maxilla (pi. 13, fig. 7) only one-third the 

 length of the anterior. Claw of maxilliped (pi. 13, fig. 8) very short, 

 with an accessory seta. Posterior ventral accessory process (pi. 13, 

 fig. '.>) consisting of a stout curved chitin rod and a membranous ex- 

 tension with a small distal lobe. Rod between the bases of legs 1 

 and 2 broadened, unarmed, curved backwardly. 



Legs 1-3 of the same form as in other species of the genus ; modified 

 spine of leg 1 as illustrated in plate 13, figure 17. Exopod of leg 2 

 (pi. 13, fig. 13) with outer spine of first segment very stout, reaching 

 only a little beyond tlie second segment; that of segment 2 reaching 

 to about the middle of the third segment. First spine of third seg- 

 ment curved downward, reaching only a little beyond distal margin 

 of the segment; second spine straight, about half the length of the 

 first. Leg 3 similar to that of P. fiores. 



Leg 4 (pi. 13, fig. 18) with the basal segment broadened and armed 

 with scattered spines; segment 2 having marginal outer spinelets 

 and a thin ventral lamina distally. All the major spines with toothed 

 margins. The terminal spines of segment 4 considerably elongated, 

 the longest being about twice the length of the segment ; the innermost 

 spine attached laterally and unusually short. Segment 3 with a 

 short lateral spine inside ; the fourth segment with a curved cuticular 

 process (or imperfectly separated spine), covered ventrally by the 

 lamina which extends outward from the distal edge of the segment. 



