COPEPODS OF THE WOODS HOLE REGION 



481 



white hake {Urophycis tenuis), ih^ alewife {Pomolohus pseudoharen- 

 gus), the minnow {Cyprinodon varieffatus), and the white perch 

 (Morone americana). These fishes were all captured in or around 

 Woods Hole. 



Distribution.— ^ovih. Atlantic (LeSueur, Milne Edwards) ; North 

 American coast (Steenstrup and Llitken, Smith, Eathbun) ; Long 

 Island Sound (Williams). 



Color.— RQ2idi and proboscis blood red, neck light horn color, di- 

 gestive canal red, trunk dark reddish black, ovaries and oviducts 

 yellowish white; egg strings greenish 

 yellow. 



Female. — Head globular; proboscis as 

 large as head and at right angles to it; 

 horns filiform, radiating from dorsal sur- 

 face of head and nearly equal in length, 

 sometimes fewer than five, rarely more 

 numerous and of different lengths. Neck 

 threadlike and about half the entire 

 length ; trunk elongated-conical, the point 

 of the cone at the base of the neck. Ab- 

 domen a short, stout, and blunt cone, on a 

 level with the dorsal surface of the trunk, 

 one-third as long and three-fourths as 

 wide as the latter ; no caudal rami. First 

 antennae 3-segmented; second antennae 

 2-segmented, with apical chelae, rami of 

 legs short, blunt, and destitute of spines 

 or setae. Total length, 35-45 mm. 



Remarks. — This is the commonest 

 species of the genus around Woods Hole 

 and is likely to be found upon other hosts 

 than those mentioned. It can be identi- 

 fied by the five radiating, unbranched 

 horns on the head, which are nearly 

 always about the same length. Rarely 

 there are only three horns and still more 

 rarely there may be seven or even eight, 

 in which case two are on the sides of the 

 thorax posterior to the head. 



Figure 287. — Lernaeenicus radia- 

 tus: a, Female, lateral (drawn 

 by Blake) ; i, female, second 

 maxilla 



LERNAEENICUS POLYCERAUS Wilson 



FiGUBB 288 

 Lernaeenicus pohjceraus "Wilson, Proc. TJ. S. Nat. Mus., vol. 53, p. 62, pi. 5, 1917. 



Occurrence. — Fixed in the flesh of the tomcod {Microgadus 

 tomcod)., caught at Woods Hole in 1885. 



Distribution. — Not found outside the present area. 



