372 Annals of the South African Museum. 



Since in all other respects, especially as regards the lateral 

 margins of the peraeon segments and the epimeia, both specimens 

 cannot be separated from the typical N. i-habdota, the variation in 

 the uropods must be looked upon as local. 



Length : 33 mm. ; breadth : 13 mm. (not including lateral spines). 



Colour : In spirit, uniform yellowish. 



Locality : Bakkoven Eock W. 4/ N. distant f mile (False Bay). 

 22 fathoms. 7/6/00. 1 immature ? . Flesh Point N. by E. 1 E. 

 distant 4 miles. 29 fathoms. 28/1/04. 1 ovigerous $ (" taken from 

 a branching sponge "). 33 24' S. 26 12' E. 20-30 fathoms. 15/3/99. 

 1 ovigerous ? . s.s. "Pieter Faure." (S.A.M. Nos. 150969, 150970 

 and A2713. ) 



Geofjr. Distribution : Senegal, from pectoral tin of Pscttus seba, 

 C. & V. (Koelbel). 



NEROCILA TRICHIURA (Miers). 



1847. Aniloera trichiura, White, List. Crust. Brit. Mus. p. 108. 



Nulla descr. 

 1877. ,, Miers, Proc. Zool. Soc. Lond. 1877, 



p. G77, pi. 69, tigs. 6, 6. 

 1881. Nerocila ,, Schioedte & Meinert, Naturh. Tidsskr. 



ser. 3, vol 13, p. 83, pi. 7, figs. 1, 2 



(ovigerous ? ). 

 1910. ,, ,, Stebbing, Tr. Linn. Soc. Lond. Zool. 



vol. 14, pt. 1, p. 102. 



One immature J , 24 mm. long, 8 mm. broad, is in the " Pieter 

 Faure " collection, but without record of exact locality. (S.A.M. 

 No. A2564.) 



Geocjr. Distribution : Indian Ocean (White) ; Mauritius (Miers) ; 

 Atlantic Ocean (Schioedte & Meinert) ; Philippine Islands ? 

 (Schioedte & Meinert) ; Great Chagos (Stebbing). 



Parasitic on Flying-fishes (Exocoetus spp.). 



GEN. IEONA, Schioedte & Meinert. 



1884. Irona, Schioedte & Meinert, Naturh. Tidsskr. ser. 3, vol. 14, 



p. 3bl. 

 1897. Hansen, Bull. Mus. Comp. Zool. Harv. vol. 31, No. 5, 



p. 110. 

 1905. ,, Stebbing in Herdman's Ceylon Pearl Fish. Suppl. 



Eep. 23, p. 27. 

 1905. Eichardson, Bull. U.S. Nat. Mus. No. 54, p. 265. 



