COPEPODS OP THE WOODS HOLE REGION 467 



Male. — Head fused with first segment; four free segments with 

 dorsal plates, the first one the longest; fifth segment nearly as wide 

 as the fourth, but much shorter; genital segment wider than the 

 abdomen, without leg rudiments; abdomen nearly as long as the 

 cephalothorax, 3-segmented; caudal rami elongate, with apical 

 plumose setae. 



First antenna 7-segmented, with stout claws near the base and one 

 or two at the tip, geniculate as in the female, the basal portion made 

 up of two segments. Second antenna uncinate; maxillipeds also 

 uncinate and not chelate as in the female. Both rami in the first 

 four pairs of legs 3-segmented, the two basal segments of the endo- 

 pods unarmed except the first segment of the second endopod, which 

 carries a long curved spine; fifth legs uniramose, lamellar, larger 

 than in the female. A single species within the present area. 



EUDACTYLINA SPINIFERA, new species 

 PlATE 34 



Occurrence. — Six females were taken from the gills of a brown 

 shark {C archarhinus miWerti) captured in the fish nets on Marthas 

 Vineyard, August, 1923. The female holotype is U.S.N.M. No. 56621. 



Color. — Body a uniform yellowish white, entirely without pigment 

 markings. 



Female. — Carapace elliptical, one-fourth longer than wide, evenly 

 rounded anteriorly and posteriorly, without lobes or spines at the 

 posterior corners. The next three segments increasing in length and 

 width backward, the fourth segment twice the length of the second 

 and considerably wider ; fifth segment the same length as the second 

 but narrower. Genital segment half the width and two-thirds the 

 length of the fifth segment ; abdomen shorter and narrower than the 

 genital segment, its two segments about the same length ; caudal rami 

 a little longer than the anal segment, each tipped with three minute 

 setae. Egg strings less than half the length of the body, each as wide 

 as the genital segment; eggs few in number, large, and but little 

 flattened. 



First antenna 7-segmented, the basal segment much longer but no 

 wider than the next two segments, the three together making up the 

 basal portion, the four terminal segments turned backward nearly at 

 right angles. The third, fourth, and fifth segments each carry on 

 their outer margins two short and stout spines. The second antenna 

 is 3-segmented, the middle segment the shortest and armed on its 

 inner margin with two stout spines, the third segment with a curved 

 apical claw having an accessory spine at its base. The second seg- 

 ment of the second maxilla has a fringe of spiny teeth along its outer 

 margin, and two small spines on the ventral surface at the distal 



