22 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 120 
Mandibular gnathobase with eight teeth, apical and subapical teeth 
typical, median teeth 1-3 biscuspidate, basal teeth 1 and 2 usually 
bicuspidate, occasionally with single cusp as in basal 3; basal seta 
well developed (fig. 6a). Mx, with B2 bearing clump of three setae 
followed by clump of two setae on inner margin (wollastoni has two 
setae in each clump), lobe 3 with four setae. Large, spinelike setae 
of Mx bearing about 1% times more pairs of perpendicular spinules, 
distance between spinules less than in wollastont. Mxp with B2 
bearing row of denticles as in all species of Labidocera examined. 
G . 
/ / } 
Sy 
Figure 9.—Labidocera diandra, stage V copepodites: a, female, posterior half of body, right 
lateral view; b, male, morph B, posterior half of body, right lateral view; c, male, morph 
A, posterior half of body, right lateral view; d, female, P5, posterior view; ¢, male, 
morph B, P5, posterior view; f, male, morph A, P5, posterior view. Stage IV copepodites, 
P5, posterior view: g, female; h, male. 
In adult female, tissue within right TV corner and ventral prong 
eranular; lobe flanking genital segment with large clear space. Tissues 
underlying tergum of genital segment also glandular in appearance. 
Spermatophore in diandra essentially similar to that in jollae and 
kolpos but differing in several fundamental characteristics from that 
in other coastal species of east Pacific Labidocera (Fleminger, 1964a). 
