(Pe tsose) 
XVI. 
THE ACTINIARIA OF TORRES STRAITS. By ALFRED C. HADDON, M.A., D.8c., 
Professor of Zoology, Royal College of Science, Dublin. 
(Prates XXII. to XXXII.) 
{Read Novremsrr 17, 1897. | 
Tue following account of the Actiniaria which have been observed in the Torres 
Straits is based mainly on the collections made by myself in 1888—9, and supple- 
mented by descriptions published by Saville-Kent in his magnificently illustrated 
books ‘‘ The Great Barrier Reef of Australia,” and ‘‘ The Naturalist in Australia.” 
A large proportion of the species have been anatomically studied by Miss 
Alice M. Shackleton and myself, and I would like to take this opportunity of 
thanking her for her share in the following memoir. In our Paper, entitled 
“Description of some New Species of Actiniaria from Torres Straits,” and pub- 
lished in the Proceedings of this Society in 1893, we described twenty-four new 
species in addition to the ten new species of Zoanthez previously published by us 
in the Transactions of this Society (vol iv., ser. 11., 1891). One form, Actinia 
citrina, was carefully studied by Dr. A. Francis Dixon (now Professor of Anatomy 
at University College, Cardiff, S. Wales). I would also like to tender my thanks 
to my friends Mr. J. KE. Duerden (Curator of the Museum of the Institute of Jamaica, 
Kingston, Jamaica, and formerly of this College); Dr. O. Carlgren of Stockholm ; 
Prof. J. Playfair M*Murrich of Michigan, and other colleagues, 
In the present communication, fifty-five species are recorded from Torres 
Straits, of which five are now described for the first time; thirty-four were 
first described by Miss Shackleton and myself; eight by Saville-Kent; and 
the rest are species which occur elsewhere, and have been described by various 
zoologists. It is, however, probable that various other species will be recorded 
from this district in the future. 
It will be seen that most of the groups of Actiniaria are represented, the most 
noticeable gaps being the Edwardsiz, Protactiniz, Ilyanthide, Paractide, Den- 
dromelidz, and of the Phyllactidee only one species is recorded. With regard to 
these, it is probable that certain members of most of the deficient groups will be 
eventually found here. No important tropical family is absent, and indeed very 
few tropical genera are unrecorded. 
TRANS, ROY. DUB. SOC., N.S. VOL, VI., PART XVI. 3 N 
