440 BULLETIN 15 8, UNITED STATES NATIONAL MUSEUM 



sixth segment half as wide as genital segment, narrowed anteriorly, 

 circular posteriorly; ventral abdominal plate much larger than the 

 sixth segment plate. Abdomen 1-segmented, with modified caudal 

 rami; first 3 pairs of legs with 2-segmented rami, fourth pair with 

 1-segmented rami; maxillipeds uncinate. 



Male. — Carapace elliptical, posterior lobes wide, curved, bluntly 

 rounded ; noi accessory lobes ; second segment with a pair of postero- 

 lateral plates ; third segment without plates or processes ; fourth seg- 

 ment with a lateral knob on either side near the anterior margin, the 

 rudiment of a dorsal plate. Genital segment oblong, with knob- 

 like processes at the anterior corners and broadly rounded lobes at 

 the posterior corners. Abdomen 2-segmented, segments equal ; caudal 

 rami f oliaceous, each with four apical setae ; rami of all four pairs of 

 legs 2-segmented; maxillipeds with a stout terminal claw. A single 

 species in this area. 



Remarks. — This genus so closely resembles Phyllophora (Milne 

 Edwards, 1840), changed to PhyllothyreU'S (Norman, 1903) because 

 PhyXlofhora had been preoccupied, that the two may be identical. 

 But Milne Edwards in his original description and figures, and later 

 Carus (1885) made the rami of the first, second, and fourth legs 

 1-segmented, T. and A. Scott said that the first exopod was 1-seg- 

 mented, the endopod 2-segmented, both rami of the second legs 2- 

 segmented, and both rami of the third and fourth legs 1-segmented. 

 Neither of these corresponds with what is here found, but as this is 

 at least a new species the differences may be specific rather than 

 generic. As the male of the type species iycornutus) has not yet been 

 found, however, and as we have here a distinctive male, it will be 

 better to wait before declaring the two genera identical. 



PARAPANDARUS NODOSUS Wilson 



Figure 277 

 Parapandarus nodosus Wilson, Proc. U. S. Nat. Mus., vol. 64, p. 8, pis. 2, 3, 1924. 



Occurrence. — Found on the gills of the hammerhead shark 

 {Sphyrna zygaena)^ the great blue shark {Galeus glaucus), and the 

 brown shark {Oar char hinus milberti). 



Distrihution. — Not found outside the present area. 



Oolor. — Body a uniform grayish white, without pigment markings, 

 the thickened portions yellowish or brownish, the egg strings white. 



Female. — Width of carapace across its posterior margin to its 

 length as 8 : 5 ; posterior corners bluntly rounded, pointing outward ; 

 the width of each pair of dorsal plates on the second, third, and 

 fourth segments about equal to that of the carapace ; plates on fourth 

 segment slightly overlapping the genital segment, their inner mar- 

 gins overlapping each other. Genital segment with straight sides 



