[November, 1891.] 



THE 



SCIENTIFIC TRANSACTIONS 



OF THE 



ROYAL DUBLIN SOCIETY. 



VOLUME IV. (SERIES II.) 



XII. 



A EEYISION OF THE BRITISH ACTINIA. PART II. : THE ZOANTHE^. 

 By ALFRED C. HADDON, M.A. (Cantab.), M.R.I.A., Professor of Zoology, Royal 

 College of Science, Dublin ; and MISS ALICE M. SHACKLETON, B.A. Plates 

 LVIIL, LIX., LX. 



DUBLIN: 



PUBLISHED BY THE ROYAL DUBLIN SOCIETY. 



LONDON: WILLIAMS AND NORGATE. 



FEINTED AT THE UNIYEESITT PRESS, BY PONSONBY AND WELDRICK, 



PKINTEES TO THE SOCIETY. 



1891. 



