102 PERCY SLADEN TRUST EXPEDITION 



1900. Cymothoidae, Stebbing, South African Crustacea, pt. 1, p. 55. 

 1905. Cymothoidae, H. Richardson, Bull. U.S. Nat. Mus., No. 54, p. 215. 



Gen. NEROCILA, Leach. 



1818. Nerocila, Leach, Diet. Sci. Nat., vol. xii., p. 351. 



1829. Ichthyophilus, Latreille, La Regne Animal, vol. iv., p. 133. 



1902. Nerocila, Stebbing, South African Crustacea, pt. 2, p. 55. 



1905. Nerocila, H. Richardson, Bull. U.S. Nat. Mus., No. 54, p. 219. 



The species which Koelbel in 1878 separated from Nerocila as Emphylia ctenophora 

 was united to the earlier genus by Schiodte and Meinert. 



16. Nerocila trichiura (Miers). 



1847. Anilocra trichiura, White, List of Crustacea in Brit. Mus., p. 108 (nomen 

 nudum). 



1877. Anilocra trichiura, Miers, Proc. Zool. Soc. London, p. 677, pi. 69, figs. 6, 6 a. 



1881. Nerocila trichiura, Schiodte and Meinert, Naturh. Tidsskr., ser. 3, vol. xiii., 



p. 83, pi. 7, figs. 1, 2. 



In this species the outer ramus of the uropods greatly exceeds the inner in length. 

 The side-plates of the hinder pergeon segments end obtusely, contrary to what is usual 

 in the genus. 



Locality. A single specimen was obtained at Great Chagos. It is attached by the 

 mouth and front claws at an angle to the underside at the base of the wing fin of a flying- 

 fish, Exoccetus evolans. 



Gen. CYMOTHOA, Fabricius. 



1793. Cymothoa (part) Fabricius, Ent. Syst., vol. ii., p. 503. 



1883. Cymothoa, Schiodte and Meinert, Naturh. Tidsskr., ser. 3, vol. xiv., p. 223. 



1905. Cymothoa, H. Richardson, Bull. U.S. Nat. Mus., No. 54, p. 247. 



17. Cymothoa eremita (Brunnich). 



1775. Oniscus osstrum, Spengler, Besch. Berl. Ges. Naturf. Fr. i., p. 312, pi. 7, 

 figs. I— K. 



1783. Oniscus eremita, Brunnich, Vid. Selsk. Skrift. Nye Saml., vol. ii., p. 319. 



1857. Cymothoa stromatei, Bleeker, Crust. Ind. Archip., p. 35, pi. 2, fig. 13. 



1883. Cymothoa eremita, Schiodte and Meinert, Naturh. Tidsskr., ser. 3, vol. xiv., 

 p. 259, pi. 7, figs. 3—13. 



The references, but not the dates, are borrowed from Schiodte and Meinert. The 

 first two dates are due to Sherborn's "Index Animalium," which, however, does not 

 mention Spengler's Oriiscus osstrum, perhaps from the opinion that it was identical with 

 the species so named by Linnaeus. The western species is now named Cymothoa osstrum 

 (Linn.), distinguished by no very strongly divergent characters from Briinnich's, which 

 inhabits the Pacific and Indian Oceans. Spengler's statement that his species was found 

 attached to whales on the coast of Greenland is regarded by Schiodte and Meinert as 



