ox CRUSTACEA BROUGHT BY DR WILLEY FROM THE SOUTH SEAS. 667 



nothing can be said as to the variations it may undergo according to sex and stage 

 of life. 



The first four pairs of legs arc similar, increasing in size successively. The 

 basal joint is large, with a fold above, the inner branch has two short stout joints 

 followed by a longer oval one, with three spines on the outer margin, and two or 

 three setules on the apex ; the outer branch is similar, but with the first and third 

 joints larger, the first and second each with a stout distal spine, the third with four 

 spines on the outer and three or four setules on the apex. The fifth legs are simple 

 cylinders or slender bag-like appendages attached to the prominences of their segment. 

 'J'he caudal appendages are rather longer than the longest segment, apparently (like 

 the first antennae) tipped with one or two minute hairs. 



Length, 8 mm. 



Habitat. Deboyne Lagoon, Panaieti, an island in the Louisiade Archipelago, New 

 Guinea, " from pallial chamber of gastropod." The generic name refers to the island, 

 the specific to the parasitic position, in which the specimen was found. 



copepoda parasitica. 

 Fam. Caligidae. 



1819. Caligidae, Leach, Diet. Sci. Nat., vol. 14, Art. Entomostraces, p. 525. 



1849. Caligidae, Dana, Proc. Amer. Acad., Cambridge, Conspectus Crust., pt. 1, 

 p 53. 



1850. Caligidae, Baird, British Entomostraca, Ray Soc, p. 25C. 

 1853. Caligidae, Dana, U. S. Expl. Exp., vol. 13, pt. 2, p. 1316. 

 1857. Caligidae, White, Popular Hist. British Crustacea, p. 310. 



180 1. Caligidae, Steenstrup and Liitken, K. Danske Vid. Selsk. Skr., Ser. 5, vol. 5 

 (Extract, p. 9). 



1864. Caligina, Krciyer, Naturhist. Tidsskrift, Ser. 3, vol. 2, p. 104. 



1868. Caligina, Heller, Reise der Novara, Crust., p. IGO. 



1889. Caligidae, Thomson, Trans. New Zealand Inst., vol. 22, p. 354. 



1899. Caligidae, Bassett-Smith, Proc. Zool. Soc. London, p. 444. 



1900. Caligidae, T. Scott, 18th Annual Rep. Fishery Scotland, part 3, p. 147. 



If, in addition to the above references, the Consid. gen. sur la classe des Crustac^s 

 of Desmarest and Hist. Nat. des Crustaci^s of H. Jlilne-Edwards bo consulted, a tolerably 

 complete synonymy of the family, with the history of its extensions ami limitations, can 

 be obtained. 



AiNcmcALKiUS, n. g. 



Carapace large, scutiform. Frontal border provided with lunulae. Ventral surface 

 without furcula. Eyes with conspicilla. First and fourth thoracic limbs uniramous; 

 second and third biramous; terminal joints of first to third pairs fringed with strongly 

 plumose setae. Fourth thoracic segment free, small, without dorsal plates. Genital 

 segment without dorsal plates or processes. Abdomen small, single-jointed, the caudal 

 plates not fully reaching its apex. 



w. V. 88 



