ON CRUSTACEA BROUGHT B^' DK WILLEY FROM TUK SOUTU SEAS. 643 



Meinertia gaudichaudii (Milne-Edwards). 



1840. Cymothoa Gaudichaudii, Milne-Edwards, Hist. Nat. Crust., vol. 3, p. 271. 



1868. Ceratothoa rapax, Heller, Reise Novarae, Crust., p. 14G, pi. 12, fig. 17. 



1883. Ceratothoa Gaudichaudii, Schiodte and Meiucrt, Naturhist. Tidsskr., Scr. 3, 



vol. 13, p. 33.5, pi. 13(20), figs. 11—1.5, pi. 14 (21), figs. 1—5. 



1893. Meinertia Gaudichaudii, Stebbing, History of Crustacea, Internat. Sci. Ser., 



vol. 74, p. 354. 



1899. Meinertia gaudichaudii, H. Richardson, Proc. U. S. Mas., vol. 21, p. 829. 



Two specimens labelled 'Parasites from floor of nioiilh of Tetrodon Pauaieti,' agree 

 very closely with the clescription and figures of the adult male of this species given 

 by Schiodte and Meinert. Yet there are some small differences. In the first antennae 

 there are eight joints instead of seven. The front margin of the first peraeon segment 

 is in the middle more broadly and deeply concave. In the last peraeopod the hind 

 margin of the second joint is much less convex than in the figure. The fifth segment 

 of the plcon has its hind margin bisinuate rather than deeply quadrisinuate. The 

 terminal segment is not slightly carinate, nor is it manifestly longer than the rest 

 of the pleon segments combined. The inner branch of the uropods is a little shorter 

 instead of longer than the outer, and both branches are apically blunt. The authors 

 quoted give the length of the adult male as 13 — 32 mm., and, as the specimens here 

 described have a length of only 13 nnii., it is probable that some of the ditierences 

 mentioned would have disap|)eared with increase of size. It must, however, be observed 

 that the terminal segment in ISchiiidte's and Meinert's own figure is shorter than the 

 other pleon segments combined. Several species in the genus have eight-jointed first 

 antennae, but none of these combine the obtusely fronted head with the subtrapezoidal 

 terminal segment of the present .species. Cinusa tetrodontis, Schiodte and Meinert, of 

 which it is said that the female with the male has prett}' often been taken in the 

 mouth or jaws of Tetrodon Honckenii Bl., has the fir.st anteiniae seven-jointed, the 

 second ten-jointed, and the head, sides-plates, and terminal segments differently shaped 

 from those of Meinertia gaudichaudii. 



Fam. Ri'HAEROMIDAE. 



1847. Sphaeromidue, White, List of Crustacea in the British Museum, p. 102. 



1900. Sphaeromidae, Stebbing, Proc. Zool. Soc. London, p. .552. 



I have so recently given numerous references to authorities on this family, that 

 it seems unnecessary here to repeat them. 



Gen. Cilicaea, Leach. 



1818. Cilicaea, Leach, Diet. Sci. Nat., vol. 12, pp. 341, 342. 

 1825. Cilicaea, Desmarest, Consid. gen. Crust., p. 295. 



1838 ? Cilicaea, Gu^rin-M^neville, Iconographic Regne Auim., Crust., pi. 30 {Cilicea 

 in text, p. 30, with correction of erroneous numbering on plate). 



w. V. 86 



