Hapvpon—The Actiniaria of Torres Straits. 473 
for those forms which have verrucee in the upper portion of the column anda 
well-marked circumscribed sphincter, all of which have been previously placed 
under the genus Discosoma. The suckers are, as a rule, inconspicuous in the 
preserved specimens, and in this respect those specimens differ markedly from 
examples of the genus Radianthus. 
S. Kenti (H. & 8.) ; S. Haddoni (S8.-Kent) ; S. anemone (Ellis) (= A. helianthus, 
Ellis: ef. M*Murrich, Journ. Morph. 11., 1889, p. 37); 7. Fuegiensis (Dana) 
(Cf. MeMurrich, Proc. U. 8S. Nat. Mus. xvi., 1893, p. 200). 
Stoichactis Kenti (H. & 5S.) 
Discosoma Kenti, . . . Hadd. and Shackl., 1893. Proc. R. D. S., vit, p. 119. 
Saville-Kent, 1893, ‘‘ The Great Barrier Reef of 
Australia,” p. 144, chromo pl. 1. Saville-Kent, 
1897, ‘‘The Naturalist in Australia,” p, 219, 
pl. xxx1x B (wrongly described as D. Haddon). 
(Ele xxxt,, fies. 6; 7.) 
Form.—A very large Actinian; column narrower below than above, upper 
portion with a broad zone of large, crowded suckers; oral disk of considerably 
greater diameter than column, and thrown into well-marked lobes; tentacles 
extremely numerous, subulate, in continuous, rapid, irregular, waving movement ; 
mouth usually with two gonidial grooves. 
Colour.—Various; column usually grey, greyish olive green, light fawn or 
pinkish brown, passing into buff above, or brownish and rusty orange above, 
upper portion with pale or sometimes dull violet suckers; tentacles, ashy grey, 
fawn-coloured or brown, or cindery-brown; sometimes the tentacles have a 
magenta, pinkish lilac or green tip; sometimes the inner tentacles are all dark 
green ; one variety has the oral disk, and the lower part of the tentacles pale sea- 
green, the upper part of the tentacles being magenta; in a rarer variety the 
tentacles are golden brown at their bases, and a rich royal blue distally; the 
oral disk being reddish brown, and orange-yellow round the mouth. 
Dimensions.—Diameter of corona from 1 to 2 feet (800—600 mm.). 
Habitat.—On reefs in Torres Straits. ‘ 
Locality.—Occurs abundantly in shallow pools, at about half or three-quarters 
ebb, among the reef of the Great Barrier system from Torres Straits southwards 
to Mackay; and on Western Australia coasts as far south as Shark’s Bay. The 
species may, therefore, be said to occur on the tropical coasts of Australia. 
In his “Great Barrier Reef,” Saville-Kent says :—‘‘ Discosoma Kenti almost 
invariably contains two or more specimens for percoid fish about 3 inches long, 
TRANS. ROY. DUB, SOC., N.S. VOL. VI., PART XVI. 8Z 
