COPEPODS OF THE WOODS HOLE REGION 



451 



Figure 283. — Lernanthropus poma- 

 tomi: a. Female, dorsal ; i, male, 

 dorsal 



tem; antennae and mouth parts horn color, egg strings brown. In 

 preservatives the red becomes a light yellow and the appendages 

 turn dark brown. 



Female. — Cephalic segment narrowest across the frontal margin, 

 which is slightly concave, and widest at the posterior margin, which 

 is regularly rounded. Anterior portion of dorsal plate rectangular, 

 with rounded corners, a half wider than long; posterior portion 



about the same width, but longer than 

 wide, covering the abdomen, caudal 

 rami, and bases of the egg strings and 

 fourth legs. Genital segment sub- 

 spherical; abdomen elongate; caudal 

 rami as long as the abdomen and 

 sharply pointed. Fourth legs bira- 

 mose, cut nearly to the base, the endo- 

 pods almost as long as the exopods. 

 Total length, without fourth legs, 4^5 

 mm. ; with fourth legs, 6-7 mm. 



Male. — Cephalic segment ovate, nar- 

 rowed anteriorly, a little wider and 

 nearly as long as the rest of the body ; 

 the latter widest through the bases of 

 the third legs and tapered both ante- 

 riorly and posteriorly. Third and fourth legs uniramose, the third 

 pair less than half the length of the fourth, both pairs bluntly 

 pointed. Caudal rami short, stout, and bluntly rounded; posterior 

 antennae exceptionally large and strong. Total length, 1.5-2 mm. 



Remarks. — This species is apparently confined to the bluefish, and 

 has not been found on any other host, and only once outside the 

 present area, as recorded above. It is often present in considerable 

 abundance. 



LERNANTHROPUS BREVOORTIAE Rathban 



Figure 284 



Lernanthropus brevoortiae Rathbun, Proc. U. S. Nat. Mus., vol. 10, p. 563, pi. 31, 

 1887.— Wilson, Proc. U. S. Nat. Mus., vol. -GO, art. 5, p. 43, pi. 8, 1922. 



Occu/rrence. — Found on the gills of the menhaden and the hickory 

 shad in the Woods Hole area. 



Distribution. — Gills of menhaden at Beaufort, N. C. (Wilson). 



Color. — Body light yellow and very transparent, more or less red 

 in living specimens, but not so- bright a red as in the preceding 

 species; antennae and mouth parts horn color; egg strings dark 

 brown. 



Female. — Carapace oblong, narrowest at the anterior margin, which 

 is convex ; widest at the posterior margin, which is regularly rounded. 



