NO. 35S6 CYCLOPOID COPEPODS — HUMES AND HO 11 



Formula for armature: 4, 13 (5 + 2 + 6), 6, 3, 4 + 1 aesthete, 2+1 

 aesthete, and 7 + 1 aesthete. All setae naked. Row of minute 

 spinules on first segment. 



Second antenna (fig. 59) 4-segmented, last segment SO^i x 20iu. 

 Armature 1, 1, 3, I, with terminal claw 43m along its axis. A few 

 minute spinules near bases of setae on third segment; two small set- 

 ules on opposite surfaces of last segment near insertion of claw. 



Labrum (fig. 60) with two posteroventral lobes and bearing numer- 

 ous hairs. 



Mandible (fig. 61) with its inner basal margin smooth, its outer basal 

 margin with a distal row of slender setules and a proximal auricular 

 expansion encircled with setules; lash elongated, its proximal inner 

 margin with blunt hj^ahne dentations, both margins distal to this 

 with spinules. Paragnath (fig. 62) an elongated lobe with distal hau's. 

 First maxilla (fig. 63) with four elements as in figure. Second maxilla 

 (fig. 64) 2-segmented. First segment somewhat swollen distoven- 

 trally, with small spinules. Second segment with a seta (having 

 hyaline lamellae) on its anterior surface, a hyaline element on its inner 

 (dorsal) margin, and a very small setule proximally on its outer 

 (ventral) margin; distal part of segment forming a lash with a margi- 

 nal row of three large slender proximal teeth gradating rapidly to 

 many slender setules; a crescent of minute spinules at base of lash. 

 Maxilliped (fig. 65) 3-segmented, first segment unarmed, second seg- 

 ment with two naked setae and a short row of minute spinules, and 

 small third segment terminally with a spine, two hyaline setae, and a 

 spinelike process with lateral spinules. 



Area betw^een maxiliipeds and first pair of legs (fig. 66) not pro- 

 tuberant; sclerotized line connecting bases of maxiliipeds. 



Legs 1-4 (figs. 67-70) with trimerous rami except for endopod of 

 leg 4 which consists of two segments. Armature as follow^s (Roman 

 numerals indicating spines, Arabic numerals setae): 



Pi protopod 0-1 1-0 



P2 protopod 0-1 1-0 



P3 protopod 0-1 1-0 



P4 protopod 0-1 1-0 



Inner seta on coxa of legs 1-3 long and plumose, but in leg 4 very 

 small (3m long) and naked. Lamellae on spines of leg 1 more con- 

 spicuously spinulose than in legs 2-4. Spinules in row across distal 

 margin of second segment of endopod of legs 1-3 much larger than 

 those on first segment of these endopods. Endopod of leg 4 with both 

 segments having inner and outer hairs. Fu'st segment 23m x 18.5m; 



