HYDROIDS FROM THE BERMUDAS. 



263 



laria insignis — occurs on only a few hydrothecae, and even there 

 is abnormal, signifying tbe occurrence of a truncation of tbe 

 hydrotbeca and subsequent regeneration (cf. the same pheno- 

 menon as described by me in Thyroscyphus tridentatus).* The 

 minute characters of the two " species" are in absolute agree- 

 ment, and even the fact that the parasitic Hydroid, Lafoea 

 venusta, which hitherto has always been found on Obelia margi- 

 nata, now occurs on Campanularia insignis, points to the identity 

 of the two. It is significant also that Jaderholm found on a 

 specimen of Obelia marginata, from the Antilles, the epizoites 

 Lafoea venusta and Aglaophenia cylindrata, both of which we have 

 now recorded as occurring upon the type specimens of Campanu- 

 laria insignis. 



It is clear, therefore, that Allman's name, Campanularia in- 

 signis, is a synonym, and must fall into disuse. Since the charac- 

 ters of Obelia marginata place it in Pictet's genus Lytoscyphus, 

 priority decides that Lytoscyphus marginata must be regarded 

 (until the evidence of the alleged identity of L.juncea and Cam- 

 panularia insignis has become more conclusive) as the name by 

 which the species should be known. 



* Ritchie, Jas., 1909, " Supplementary Report on the Hydroids of the 

 Scottish National Antarctic Expedition " (Trans. Roy. Soc. Edinburgh, 

 vol. xlvii. part i. p. 75). 



