NO. 3586 CYCLOPOID COPEPODS — HUMES AND HO 17 



Armature of legs 1-4 as follows (Roman numerals indicating spines, 

 Arabic numerals setae): 



In one female second segment of one endopod of leg 1 with an 

 extra outer spine (1,1,1). In another female second segment of one 

 exopod of leg 2 with an extra inner seta (III, II, 3). 



Leg 5 (fig. 99) without a free segment, and reduced to three setae, 

 one dorsal 24n, and two ventral 16^ and ISix in length. 



Color in life, in transmitted light, amber in cephalosome, rest of 

 body translucent, eye red but indistinct. 



Small immature male. — Body (fig. 100) elongated, rather vermi- 

 form, contractile, head region sometimes partly withdrawn into 

 cephalosome and urosom,e often bent or contracted. Length (excluding 

 setae on caudal rami) 1.17 m.m (0.89-1.44 nun) and greatest width 0.26 

 mm (0.22-0. .30 mm), based on 10 specimens not strongly contracted. 

 Ratio of length to width of prosome about 2.61: 1. Segment of leg 1 

 fused with head. 



Urosome (fig. 101) slender. Probably three postgenital segments, 

 but their separation obscure, particularly between last two segments. 



Caudal ramus (fig. 102) small, lobate, without distinct articulation 

 with anal segment and bearing three spinules on dorsal surface 

 (ventral surface smooth). 



Sm'faces of prosome and m-osome apparently unornamented, though 

 wrinkled condition of cuticula in preserved specimens makes this 

 difficult to determine. Ratio of length of prosome to that of urosome 

 (in specimen shown in fig. 100) about 1.40 : 1. 



Rostrum (fig. 105) a tumid lobe as in female. 



First antenna (fig. 103) 1-segmented, very short, about 44;u long, 

 with 13 short terminal spines. Second antenna (fig. 104) probably 3- 

 segmented (segmentation suggested by sclerites, no clear articidations 

 present), about 64/i long. Last segment with eight short spines. 

 External to base of second antenna and behind first antenna a con- 

 spicuous lobe (fig. 105), as in female. 



Labrum a bulbous area between and behind second antennae, in 

 ventral view (fig. 105) somewhat triangular and attached to a tri- 

 angular sclerotized framework. Postlabral region forming a fold that 

 slightly overlaps posterior end of labrum. Mouth region apparently 

 located between labrum and postlabral fold. Mandibles, paragnaths, 

 and fu-st maxillae not discernible and apparently absent. Second 



228-964—66 .3 



