COPEPODS OP THE WOODS HOLE REGION 



113 



Color. — Body of female in general transparent, the ovaries and 

 oviducts bluish black as far back as the posterior margin of the 

 third segment. This black extends out on either side along the 

 grooves between the segments to the lateral margins. Fourth and 

 fifth segments, including the large wings at the posterior corners, 

 entirely transparent. Posterior portion of genital segment and 

 first abdominal segment with a faint wash of brown; anal segment 

 blue, deepest along the lateral margins and extending onto the bases 

 of the caudal rami. Eye dark reddish brown, with a blue crescent- 

 shaped spot behind it around the anterior end of the stomach. 

 Exopods of first and second legs flecked with black. 



Male also transparent, the blue of the bases of 

 the mouth parts extending onto the ventral sur- 

 face and around the anterior end of the stomach. 

 A narrow reddish-brown line extends along the 

 groove between the head and first segment on the 

 sides of the body, and there is an elongated spot 

 of the same color on either side of the intestine in 

 the fourth and fifth segments. The thickened 

 portion of the grasping antenna is bright brick 

 red (Rathbun). 



Female. — Posterior corners of fifth segment 

 with very large sharp-pointed processes, reaching 

 beyond the posterior margin of the genital seg- 

 ment; the latter is swollen into a knob on each 

 side near the distal end; second (basipod) segment 

 of fifth legs as wide as long and unarmed ; penul- 

 timate segment with two small spines on the outer 

 margin, the large spine at the inner distal corner 

 as long as the segment itself, parallel with the 

 axis of the leg, and setose on both margins dis- 

 tally ; end segment narrow, with two apical spines, 

 the inner one twice as long as the outer. Total length, 1.3-1.6 mm. 



Male. — Body more slender, the posterior corners of the fifth seg- 

 ment smoothly rounded, and the genital segment without lateral 

 knobs; second (basipod) segment of left fifth leg swollen but little, 

 terminal segment enlarged distally and ending in two rounded 

 knobs; right fifth leg distinctly 5-segmented, the third segmenj; 

 longer and much narrower than the second, the terminal segment 

 filiform and a little longer than the penultimate segment. Total 

 length, 1.2-1.5 mm. 



Renioirks. — Fish found this species in Woods Hole Harbor from 

 February to August, and it is probably well distributed throughout 

 the area. The winglike processes at the corners of the fifth segment 



Figure 75.^ — Euryte- 

 mora herdmuni: a, 

 female, fifth legs ; 

 b, fifth legs 



