484 Hapvpon—The Actiniaria of Torres Straits. 
cannot be entirely retracted. Mouth rounded oval; cesophagus finely folded with 
two gonidial grooves, which do not show when the mouth is closed, but are very 
apparent when the cesophagus is puffed out. Tentacles of two kinds—(qa) small, 
simple or branched in radial series on disk; of these there can be made out 
12 primary and 12+ 24448 (=96) rows of varying size; but they are in 
reality not graded with perfect regularity ; there is also a single row at the 
periphery; (2) Between the last-mentioned marginal row and the remainder 
is a continuous border of short, thick, knob-like, adhesive tentacles (pl. xxv., 
fig. 6). 
Colour.—Column translucent, yellowish white with irregular blotches of a 
pale olive green, or dull orange colour, each crenulation of the capitular margin 
has a white spot; oral disk translucent buff or cream, or madder lake ; dendritic 
tentacles, pale translucent buff, with a greenish sheen in certain lights; the 
ectoderm is colourless, and the dark core shines through, the colour being 
probably due to the zooxanthelle; or these tentacles have, in the mass, various 
shades of green and brown. The adhesive tentacles are pale translucent buff 
with a brown core at tip marked with pale radial lines; the ectoderm is colourless. 
Area round mouth and the cesophagus white. 
Halitat.—Reef, Murray Islands. 
The foregoing is a description of the specimens collected by myself in Torres 
Straits. It agrees so well, save for small differences of colour, with Kluuzinger’s 
description, that I can see no reason why they should not be the same species. 
Klunzinger’s specimens from the Red Sea had a whitish body, with red, brown, 
or brownish yellow to orange-coloured spots and streaks; foot yellow, with 
yellow-red spots; tentacles brownish, variegated with reddish; tips white; the 
form of wart-like tentacles usually rose- or brown-red to grey; its marginal ten- 
tacles white. Studer describes his specimen as green. He obtained it in the 
Straits of Galewo, on the coast of Salwatti, N.-W. New Guinea. Kwietniewski 
has figured the sphincter muscle of this latter form; and it will be seen that, 
though it belongs to the same type of muscle, it differs considerably in detail, 
the mesoglceal plaits being much coarser and very irregularly developed. I expect 
this is a distinct species, but until we have more information about the original 
determination of this form, the name may stand. Of course it is quite possible 
that the specimen I collected may also be a new species; for the present I prefer 
to leave the matter as it stands. The presence of the suckers on the column may 
have been overlooked by previous observers. 
I have not made out the arrangement and number of the mesenteries of this 
form. The sphincter muscle (PI. xxxuz., figs. 5, 6) is of the circumscribed type, a 
number of very fine branched plaits arising in a regular manner from a stout 
mesogloeal axis. The endoderm contains zooxanthellae. 
