474 Scientific Proceedings, Royal Dublin Society. 



Ballycotton, Co. Cork. On the same day Halcampa chrysanthellum 

 was dredged from fifty-two fathoms. 



Bibliography of Larval Actinle Parasitic on Medusa. 

 North European Seas. 



Peachia fultoni, . . T. Strethill Wright, 1859, Proc. Boy. Soc. 



Edinb., ii., p. 91, 1860 ; New Edinb. 

 Phil. Journ., xii., p. 156. 



Halcampa, „ . . Keprinted rn.Ann.Mag. Nat. Hist. (3), viii., 



1861, p. 132. 



„ „ . . G. Leslie and W. A. Herdman, 1881, In- 



vert. Fauna of Firth of Forth, p. 63 

 (merely repeats Wright's record). 



Philomedusa „ . . A. Andres, 1883, Le Attinie, Atti. Ace. 



Bom. (3 a), xiv. [Fauna, u. Fl. d. 

 Golfes v. Neapel (1884), p. 114.] 



Halcampa chrysanthellum, A. C. Haddon, 1886, Proc. Boy. Dublin 



Soc. (N. B.), v., p. 11 ; Proc. Boy. 

 Irish Acad. (2), iv., Sci., p. 527. 

 (Noted in Zoologist, 1886, p. 7). 



There can be little doubt concerning the justice of considering 

 the above to be the larval form of Halcampa chrysanthellum ; the 

 form, colour, structure, and histology support this conclusion. 



In the only three localities where the parasitic larva has been 

 hitherto found the adult Halcampa chrysanthellum' has also been 

 obtained, viz. Firth of Forth (Leslie and Herdman, loc. cit., p. 62, 

 on the authority of F. E. Schulze, "Zoologische Ergebnisse der 

 Nordseefahrt," in. Coelenterata, p. 140: Berlin, 1874), Dublin 

 Bay, and Cork (A. C. H.). 



In a former paper \_Proc. Roy. Dubl. Soc. (n.s.), v., 1886, p. 1J 

 I have endeavoured to show that the forms known as Edwardsia 

 duodecimcirrata, Sars (from Norway and E. Denmark), Zanthiopus 

 bilateralis, Kef., and X. vittatus, Kef. (from N. France), are one 

 and the same with this species. If this be so, the parasitic larva 

 must have an equally North European range. 



