. Bulletin - United States National Museum. Science. 486 BULLETIN 15 8, UNITED STATES NATIONAL MUSEUM LERNAEOCERA BRANCHIALIS (Linnaeus) Figure 292 Lernaea tranchialis Linnaeus, Systema naturae, ed. 12, vol. 1, p. 1092, 1767. Lernaeocera hrancMaUs Wilson, Proc. U. S. Nat. Mus., vol. 53, p. 85, pis. 10, 12. 17, 1917. Occurrence.—Fastened to the gill arches of the common cod, cap- tured in and around Woods Hole. Distribution.—European coasts (Linnaeus, Miiller, Blainville, Nordmann, Kr0yer) ; British Isles (Baird, Thompson, T. and A. Scott) ; Greenland (Steenstrup and Liitken) ; Iceland (Hansen)
. Bulletin - United States National Museum. Science. 486 BULLETIN 15 8, UNITED STATES NATIONAL MUSEUM LERNAEOCERA BRANCHIALIS (Linnaeus) Figure 292 Lernaea tranchialis Linnaeus, Systema naturae, ed. 12, vol. 1, p. 1092, 1767. Lernaeocera hrancMaUs Wilson, Proc. U. S. Nat. Mus., vol. 53, p. 85, pis. 10, 12. 17, 1917. Occurrence.—Fastened to the gill arches of the common cod, cap- tured in and around Woods Hole. Distribution.—European coasts (Linnaeus, Miiller, Blainville, Nordmann, Kr0yer) ; British Isles (Baird, Thompson, T. and A. Scott) ; Greenland (Steenstrup and Liitken) ; Iceland (Hansen); Denmark, Sweden, Norway (Kr0yer, Hansen) ; coast of Maine (Wilson). Color.—Body dark reddish brown, becoming yellow in preserva- tives ; horns dark brown; ^gg strings orange-yellow. Female.—The dorsal horn longer than the lateral ones, all three pro- fusely branched, the tips of the branches usually swollen. Neck often wrinkled transversely; trunk consid- erably elongated and bluntly rounded. Head turned forward at right angles to the neck, so that the proboscis when protruded is parallel with the axis of the neck. The first two pairs of legs are close together, the third and fourth pairs are separated a little, the fifth pair is obsolete. Total length, 30-40 mm. Egg strings, 150-200 mm. long. Remarhs.—If found at all the males will be only 1 mm. long and perfectly free, darting about over the gill filaments of their host. They have been found on the gills of the plaice and the lumpfish in European waters but have never been reported from our American shores. They must be present, however, upon some convenient host, and will probably be found in the near future. The female can be recognized by its large size and the S-shaped curve of the trunk. Genus LERNAEOLOPHUS Heller, 1865 Female.—Head fused with first segment and turned forward at right angles to the neck axis, and armed with three horns, one dorsal and two lateral. Neck cylindrical, stout, attached to the tr
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