486 Happon—The Actiniaria of Torres Straits. 
Size.-—Expanse of oral disk about 100-130 mm. (4—5 inches), S.-K.; height of 
column 50 mm. (2 in.); diameter of disk 120 mm. (4% in.), Klunz. 
Habitat.—Red Sea and tropical coast of Queensland, from Torres Straits to 
Cape Flattery. 
I have no doubt that Saville-Kent has correctly identified his form with that 
described by Ehrenberg and by Klunzinger. Although the following species was 
not obtained by him actually in the Straits, I have included it here, as there is 
every probability that it will be found there eventually; but it is possible that 
this will prove to be a member of the genus Thalassianthus. 
Heterodactyla hypnoides, S.-K. 
Heterodactyla hypnoides, Saville-Kent, 1893—“ Barrier Reef,” p. 148, chromo 
pl. u1., fig. 6. 
Form.—Very similar to the preceding. The tentacles were minutely sub- 
divided, and so crowded together on the convoluted surface of the oral disk, that 
they presented the aspect of aggregated tufts of fine, brightly-coloured moss. A 
few small scattered groups of tentacles were observed a little within the general 
mass; but they did not occur as isolated units or in radiating lines, asin H. Hemp- 
richii, The nematospheres form considerably larger clusters, twenty to thirty 
being closely aggregated on one stalk. The centre of the disk is more bare of 
tentacles than in the other species, and the edge of the disk is puckered up with 
such complexity that, judging from Savyille-Kent’s figure, it looks like a wreath of 
green flowers, three deep; a group of nematospheres forming the centre of each 
flower. 
Colouwr.—Column and oral disk light stone-grey, with a tendency to pale 
green; tentacles brilliant grass-green; nematospheres bright amethyst, slightly 
darker at the apex. 
Habitat.—Barrier Reef, Cape Flattery. 
ACTINERIA, Blainv. 
Thalassianthide, with the margin of the oral disk thrown into very numerous, 
small, permanent lobes, each of which bears numerous short plumose tentacles on 
its oral aspect, and a group of globular tentacles on its aboral aspect. 
A, villosa (Q. & G.). A. dendrophora, H. & S$. 
