no. 3613 TWO NEW CRUSTACEANS — BOWMAN AND KORNICKER 7 



longitudinal bar on each side, divided posteriorly, has strong bar 

 extending laterad between 2nd maxilla and maxilliped; focusing shows 

 this lateral bar to be folded as it passes anteriad and reaches base of 

 2nd maxilliped. 



1st antenna 2-merous; proximal segment long, well provided with 

 setae as shown in figure 16, bearing distally a long esthete; 2nd segment 

 short, with 2 apical setae. 2nd antenna absent. 1st maxilla with 2 

 processes, directed anteriad and laterad. 2nd maxilla apparently 

 2-merous; proximal segment robust with row of surface spinules, 

 produced distally into lobe overlapping medial surface of distal seg- 

 ment; distal segment with apex ending in 2 teeth. Maxilliped 3- 

 merous; 1st segment without ornamentation; 2nd segment with short 

 blunt distal spine; distal segment short, conical, entire. 



Legs and caudal rami composed of single short cylindrical segment 

 bearing a single terminal seta with swollen base. 



Boundaries of genital area not evident. Genital apertures broadly 

 U-shaped, located lateral to and slightly anterior to caudal rami. 

 Seminal receptacles oval. 



Male. — Length .11 to .13 mm. Body chunky, about % as broad 

 as long and nearly % as high as long. Head somewhat more than K 

 total body length; anterior margin smoothly rounded, lateral margins 

 evenly convex; greatest width at level of bases of 2nd maxilla; dorsum 

 bare except for row of hairs on posterior part of each lateral margin. 

 Trunk much narrower than head, tapering posteriorly to rather 

 narrow obtuse apex, densely clothed with long hairs. 



1st antenna essentially like that of female, but apparently 1- 

 merous since suture could not be discerned. 2nd antenna absent. 

 1st maxilla with 2 processes. 2nd maxilla with serrulate ridge on 

 proximal segment; lobe at base of claw with serrulate margin; ter- 

 minal claw undivided at apex. Maxilliped reaching back nearly to 

 posterior end of trunk, like that of female. Trunk legs apparently 

 absent. Caudal ramus like that of female. 



Copepodid. — Length 0.17 mm. Prosome oval, nearly 3>2 times 

 as long as urosome. Front with U-shaped list with arms extending 

 over bases of 1st antennae. Pouch pointed, reaching base of second 

 trunk legs. 1st urosomite with V-shaped ridge on ventral surface, 

 arms of V leading to bases of ventral pair of setae. Ventral setae 

 only slightly shorter than dorsal setae. 2nd urosomite about as long 

 as 1st and as broad as posterior part of 1st. 3rd urosomite fused 

 ventrally but not dorsally with caudal rami. Caudal rami with 1 

 pair of robust medial setae, nonplumose and more than twice as long 

 as urosome, and 3 pairs of shorter lateral setae. 



1st antenna 3-merous; 1st segment with 2 setae; 2nd segment short, 

 unarmed; 3rd segment with the usual pair of long apical setae and 6 



