COPEPODS OF THE WOODS HOLE REGION 



439 



dogfish, and the brown shark. Males are not only found on these 

 sharks with the females but also on the outside surface of the flounder 

 and killifish. 



Distribution. — Found outside the present area only at Beaufort, 

 N. C, in the throat of the sharp-nosed shark {Scoliodon terrae- 

 novae), the hammerhead shark {Sphyrna zygaena)^ and the bonnet- 

 head shark [Reniceps tihuro). 



Color. — Body a uniform light yellowish white and fairly trans- 

 parent, the coiled oviducts in the genital segment darker yellow and 

 opaque ; egg strings almost pure white, turning grayish brown with 

 development. 



Female. — Frontal region strongly narrowed and separated from the 

 rest of the carapace; frontal plates very prominent; posterior lobes 

 short and broad. Dorsal plates on fused second and third segments 

 with angular corners; plates on 

 fourth segment with a broad and 

 shallow sinus. Caudal rami each 

 as large as the abdomen, with 

 four apical setae, equidistant 

 from one another; maxillipeds 

 with a stout, flattened terminal 

 claw. Total length, 6.5-7.5 mm. 



Male. — Carapace indistinctly 

 grooved ; posterior lobes narrow, 

 each with a stout spine inside its 

 base on the posterior margin of 

 the carapace. Genital segment 

 strongly narrowed at its anterior 

 end, with concave posterior cor- 

 ners ; basal segment of abdomen hardly visible in dorsal view ; caudal 

 rami each with three apical setae and one on the inner margin 

 removed from the others. Total length, 4-5 mm. 



Remarks. — This is the only copepocl likely to be found inside the 

 throat of a shark ; the female may be identified by the fusion of the sec- 

 ond and third segments, with a single pair of dorsal plates ; the male 

 lacks the accessory lobes on the posterior margin of the carapace and 

 the fifth and sixth les rudiments. 



Figure 276. — Ncsipims alatus: a, Female, 

 dorsal ; b, male, dorsal 



Genus PARAPANDARUS Wilson, 1924 



Female. — Head fused with first segment; carapace narrowed ante- 

 riorly, cephalic area clearly differentiated ; no posterior lobes ; second, 

 third, and fourth segments each with a pair of dorso-lateral plates. 

 Fourth legs visible behind the plates on the fourth segment; genital 

 segment with straight sides and no posterior lobes. Dorsal plate of 



