ART. 5. NORTH AMERICAN PARASITIC COPEPODS WILSON. 67 



5. Second segment larger than the others ; anal laminae narrow and cylin- 



drical, each with two rudimentary spines and without the fringe of 



hairs similis, T. Scott, 1902 



0. Second segment the same size as the third and fourth ; anal laminae flat- 

 tened, each with five stout spines and without the fringe of hairs ; exopod 

 of first legs one-jointed acanthii A. Scott, 1901 



6. A large spine at each posterior corner of the carapace ; no claws on first 



antenna ; abdomen two-jointed nigra Wilson, 1905, p. 67 



6. No spines at posterior corners of carapace ; two huge curved claws on the 

 first antennae; abdomen one-jointed uncinata Wilson, 1908 



Remarks. — Hesse ^^ described and figured two new species, both of 

 which he referred to the present genus, and to which he gave the 

 specific names musteli-laevis and charchmnae-glauci. While it is 

 fairly probable that these species do belong here, we cannot accept 

 them as he has presented them on account of serious discrepancies 

 in his text and figures. In his dorsal view of Tnusteli-laevis (fig. 1) 

 there are five free segments in front of the genital segment and the 

 fifth legs are on the latter. In lateral view (fig. 2) the fifth legs 

 are on the fourth free segment. In figure 1 the abdomen is one- 

 jointed, in figures 2 and 11 it is two-jointed, and in figure 10 it is 

 three-jointed. In figure 2 the first thorax segment is fused with the 

 head, while in figure 1-i, which is a lateral view of charc1iari(m- 

 glauci^ the first segment is distinctly separated from the head. The 

 dorsal view of this latter species (fig. 13) shows the Qgg tubes 

 coming out from under the fifth legs. The lateral view (fig. 14) 

 shows that these legs are on the fifth free segment and distinctly 

 separated from the genital segment. Furthermore figure 13 shows 

 a pair of stalked eyes, of which Hesse stated in his text : " Les yeux 

 sont petits et places pres du bord frontal a I'extremite cle deux petits 

 appendices tubulif ormes " (p. 11). Due allowance can be made for 

 poor figures and faulty descriptions, but when both unite in ascrib- 

 ing a pair of stalked eyes to a parasitic copepod, prudence demands 

 that the species be ignored until future investigation determines 

 what it is and where it belongs. 



EUDACryLINA NIGRA Wilson. 



Plate 11, figs. 76-85 ; plate 12, fig. 86. 



Eudactylina nigra Wilson, Proc. Biol. Soc. Washington, vol. 18, 1905, p. 

 131. 



Host and record of specimens. — Twenty specimens, all females, 

 were obtained from the gills of the sand shark, Eugomphodus lit- 

 toralis, at Woods Hole in July, 1902, by the author. One has been 

 selected to serve as a type of the species with Cat. No. 54070, 

 U.S.N.M. The others become paratypes with Cat. No. 54071, 

 U.S.N.M. Another lot of 60 specimens, also all females, was ob- 



80 Ann. Sci. Nat. Zool., vol. 16, 1883, pp. 8-13, pi. 14, figs. 1-23. 



