. Bulletin - United States National Museum. Science. 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
. Bulletin - United States National Museum. Science. 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 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 t
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