THE ANNALS 



AND 



MAGAZINE OF NATPEAL HISTORY. 



[SEVENTH SERIES.] 

 No. 11. NOVEMBER 1898. 



XLI. — Some neio or rare Parasitic Copepods found on Fish 

 in the Indo-Tropic Region. By P. W. Bassett- Smith, 

 Staff-Surgeon R.N., F.R.M.S., F.Z.S. 



[Plates X -XII.] 



In this paper, following two others published in the 

 ' Annals,' I have adduced a few more interesting new forms 

 of these parasitic animals, and also examples of some in which 

 one sex alone has been described. With constant examina- 

 tion of the fresh fish at the markets and at the places where 

 they were landed there was found no dearth of material to 

 work upon ; in fact, one is astonished at the great number 

 and variety which are discovered, also how particularly prolific 

 some fish are — the genus Caranx being the most noticeable ; 

 it was very rare not to find one or more species on a fish : 

 from the inside of the operculum or attached to the head- 

 kidney might be obtained Caligus tenax. Hell., C. carangis, 

 Kr., C. robustus, sp. n. ; and on Caranx djedaba, Bomolochus 

 megaceros, Hell. ; attached to the gills themselves Leman- 

 thropus giganteus, Koll., or a second undescribed species 

 found on Caranx Rottleri, the long dark-coloured egg- tubes 

 making them very apparent ; once on the surface-skin of a 

 large Caranx I found specimens of a fourth species of Caligus 



Ann. cf- May. N. Hist. Ser. 7. Vol. ii. 2-3 



