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Show 1899.] PARASITIC COPEPODA O N FISHES. 479 (6) BICHIARDIA SCLEN^E. 2 cf. Philichthys scicena Bichiardi, op. cit. 1875. „ C. Vogt, Arch. Zool. Exp. vol. vi. 1877, p. 412. Host : lateral line of Scicena umbra. Mediterranean. (7) BICHIARDIA DENTICIS. 2 • (Plate XXVI. fig. 3.) Philichthys denticis Bichiardi, op. cit. 1876, pl. vi. fig. 2. Host: frontal sinus of Dentex vulgaris. Mediterranean. (8) BICHIARDIA BARALDI. Philichthys baraldii Bichiardi, op. cit. vol. iii. 1876, pl. vi. fig. 5. Host: frontal sinus of Chrysophrys aurata. Mediterranean. G. 3. SPHCERIFER Bichiardi. (Sphcerosoma Leydig.) Female. Head small, obtuse. Body elongated, segmented; first thoracic segment slender, the second large and spherical, followed by five diminishing joints, in the second of which are seen the genital pores ; there is a single pair of acute processes projecting from the enlarged segment, and a pair of elongated appendages from the last. The anterior antennae are triarticulate. Egg-sacs globular. Male not know7n. (1) SPH.ERIFER CORVINE. Sphcerosoma corvince Leydig, Arch, f, Natur. v. Trosch. xvii. 1851, p. 259. Sphcerifer cornutus Bichiardi, Soc. Toscana de Sc. Nat. ii. 1876. „ ' „ C. Vogt, Arch. Zool. Exp. vol. vi. 1877, p. 413. Host: mucous canals of Corvina nigra and Scicena aquila. (2) SPHJERIEER LEYDIGI. (Plate XXVI. fig 4.) Sphcerifer leydigi Bichiardi, op. cit, 1876, pl. vi. fig. 6. Host: mucous sinus of Umbrina cirrhosa. Mediterranean. G. 4. COLOBOMATUS Hesse. Female. Head round or conical. Body elongated, segmented ; three narrow free thoracic joints followed by an enlarged oval genital portion, and two or three slender abdominal joints; there are three pairs of lateral obtuse appendages, one pair of caudal, and one pair of spathulate processes from the head directed forwards. Anterior antennas with four or five articulations. Posterior antennas small, uncinate. Proboscis and maxillipeds present; also a small single eye. External ovarian tubes not observed. Male not known. (1) COLOBOMATUS LAMM. 2 • Colobomatus lamnce Hesse, Ann. Sci. Nat. ser. 5, xvii. 1873 p. 3, pl. xxiv. fig. 1. „ ,, C. Vogt, Arch. Zool. Exp. vol. vi. 1877, p. 387. Host: nasal fossa of Lamna cornubica. |