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Show 1899.] PARASITIC COPEPODA ON FISHES. 487 (1) LERNcEA BRANCHIALIS. 2 cf • Lerncea branchialis Linn. Syst. Nat. 12 ed. 1767, p. 1092; Lamarck, Cuvier, Burmeister, Gucrin, Kroyer, Oken, M.-E.. Thompson, Baird, Stp. & Liitk., V. Ben., B.-S., Hesse. ,, „ cf Claus, Beitrag zur Naturges. der Lern. 1868, p. 16, pl. iii., iv. ., „ Al. Mrazek, Beitrag zur Anat. cler Lern. 1895. „ „ I. C. Thompson, Bep. Copep. of Liverp. Bay, 1893, pl. xxiv. ,, gadina Mull. Zool. Dan. iv. p. 65, pl. cxviii. fig. 4. „ 0. Fabr. Faun. Grcenl. 1780, p. 339. Lernceocera branchialis Blainv. Journ. de Physique, xcv. 1823, p. 376, pl. xxvi. fig. 1. „ „ Nordm. Mikrogr. Beitrage,ii. 1832, p. 130. ,, sigmoidea Stp. & Liitk. Bidrag til Kundskab, 1861, 1 p. 404, pl. xiii. fig. 29. In Coll. Brit. Mus. Host: gills of Gadidce. N. temperate region. (2) LERN^A RIGIDA. 2 • Lerncea rigida Kr. Bidrag til Kundskab, 1863, p. 320, pl. xviii. fig. 2. Host:- ? Valparaiso. (3) LERNCEA LUSCI. 2 • Lerncea lusci B.-S. Ann. & Mag. N. H. ser. 6, xviii. 1896, p. 13, pl. iv. fig. 6. In Coll. Brit. Mus. Host: gills of Gaclus luscus. Plymouth. (4) LERNCEA LOTELLCE. 2 • Lerncea lotellce Thomson, Trans. N . Z. Inst. 1889, vol. xxii. p. 369, pl. xxviii. fig. 3. In Coll. Brit. Mus. Host : Lotella bacchus. N. Zealand. G. 10. HcEMOBAPHES Stp. & Liitk. Head rectangular, without horn-like processes. Two more or less distinct thoracic segments' are visible crowded behind the head, each with a pair of bilobed, not articulated limbs ; neck very elongated, acutely curved, near which flexure are two short blunt processes. Genital segment dilated, twisted on itself, with, on either side over the origin of the spirally coiled egg-tubes, a pair of tubercles; abdominal portion considerably narrower, with blunted extremity. Two pairs of biramose biarticulated limbs are present. 32* |