by Rev. T. R. R. Stebbing. 23 



ISOPODA. 



Family CYMOTHOIDJE. 



Genus NEROCILA, Leach, 1818. 



See S. Afr. Crust., pt. 2, p. 55, 1902 (Gilchrist's Marine Investi- 

 gations). 



Nerocila armatus, Dana. 



1853. Nerocila armata, Dana, U.S. Expl. Exp., vol. xiii, p. 761, pi. 

 50, figs. lOa-d. 



1881. if. cephaloles, Schiodte <fe Meinert, Nat. Tidsschr., ser. 3, vol. 

 xiii, pp. 9, 60, pi. 4 (11), figs. 16-18. 



1902. if. c, Stebbing, S, African Crust., pt. 2, p. 55. 



1910. if. c, Stebbing, Ann. S.A. Mus., vol. vi, pt. 4, p. 423. 



A female specimen, taken on the beach by Mr. H. W. Bell Marley, 

 measures 23 mm. in length. It corresponds well with if. cephalotes, 

 the species to which I formerly assigned a similar specimen sent me 

 by Dr. Gilchrist. But while I formerly took for granted the validity 

 of the name given by Schiodte & Meinert, on this occasion I consulted 

 Dana's much earlier treatise, and was interested to discover how the 

 Danish authors discriminated their species from Dana's. The search, 

 however, proved fruitless, as they do not include the American 

 author's species among the twenty-seven which they so elaborately 

 describe and figure. They must have overlooked it in describing j\ t . 

 cejjhalotes as a novelty, an error in which I have followed them, but 

 now believe myself justified in offering the present correction. 



