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Show 4 4 4 MR. P. W . BASSETT-SMITH O N [-A-PR- 1 8 (2) ERGASILUS TRISETACEUS. 2 • Ergasilus trisetaceus Nordm. Mikrog. Beitrage, 1832, p. 16, pl. in. fig. 7. AHO M.-E. Hist. Nat. Crust, vol. iii. 1840, p. 478. tlost: gills of Silurus glanis. (3) ERGASILUS GIBBUS. 8 . Ergasilus gibbus Nordm. Mikrog. Beitrage, 1832, p. 16, pl. iii. fig. 1. „ M.-E. Hist. Nat. Crust, vol. iii. 1840, p. 478. Host: gills of Anguilla vulgaris. (4) ERGASILUS L O N G I M A N U S . tf • Ergasilus longimanus Kr. Bidrag til Kundskab, 1863, p. 231, pl. xiii. fig. 1. Host : gills of Mugil sp. Brazil. (5) ERGASILUS EUNDULI. $ . Ergasilus funduli Kr. Bidrag til Kundskab, 1863, p. 228, pl. xi. fig. 1. Host: gills of Fundulus limbatus. N e w Orleans. (6) ERGASILUS LABRACIS. 2 • Ergasilus labracis Kr. Bidrag til Kundskab, 1863, p. 229, pl. xi. fig. 2. Host : gills of Labrax lineatus. "West Indies. (7) ERGASILUS LIZ^E. $ . Ergasilus lizce Kr. Bidrag til Kundskab, 1863, p. 232. Host: gills of Mugil liza. New Orleans. (8) ERGASILUS PEREGRINUS. 2 • Ergasilus peregrinus Heller, Beise d. Novara, 1865, p. 152 pl. xiii. fig. 1. Host: gills of Perca chuatsi. Shanghai. (9) ERGASILUS GASTEROSTEI. $ . Ergasilus gasterostei Kr. Bidrag til Kundskab, 1863, p. 233, pl. xii. fig. 2. Thersites „ Pagenst. Archiv f. Natur. 1860, p. 120, pl. v. fig. 8. Host: gills of Gasterosteus aculeatus. Norwav. Family II. CALIGID^E. Carapace broad, compressed. Cephalothorax incompletely provided with limbs, the free thoracic segments frequently overlapped or hidden by paired dorsal plates. Anterior antennae short, with two or three joints. Posterior antennae in the form of an articulate |