Happon—The Actiniaria of Torres Straits. 457 
below the cinelides thin and expanded, usually with additional internal mesen- 
teries intercalated between the larger ones ; tentacles numerous, slender, 
subulate, highly contractile. Acontia highly developed, emitted freely through 
the cinclides. 
This definition is based mainly on that of Verrill, who instituted this genus 
for Actiniaria, which are allied to Adamsia, but which have a higher column and 
less expanded base ; the tentacles also are longer. The type species is C. decorata 
(Drayt.). This genus appears to be abundant in the tropical seas, the species 
usually living upon univalyve shells inhabited by hermit-crabs. The colours are 
usually brilliant and varied. 
C. decorata (Drayt.), @. tricolor (Les.), @. bicolor (Les.), C. Egletes (D. & M.), 
C. fusea (Q. & G.), C.? polypus (Forsk.), C. variegata (Verr.), C. Rondeletii (D.Ch.) 
(= A. efeeta and A. parasitica, Auct.), C. Miriam (H. & S8.). 
Calliactis Miriam (H. & S.). 
Adamsia Miriam, Hadd. and Shackl., 1893, Proc. R.D.S8.,. vu, p. 130. 
(Pl. XXIII., fig. 25.) 
Form.—Pedal disk greatly expanded; body columnar, smooth, twenty-four 
cinclides where the column passes into the pedal disk; oral disk of scarcely greater 
diameter than column, completely retractile ; mouth linear, two gonidial grooves ; 
tentacles numerous, short, in at least five cycles. 
Colour.—Base pale, with six large and six smaller brown patches, the spaces 
between with delicate brown lines; cinclides yellowish white; column reddish 
brown; the crown of tentacles is mottled with six radial patches of dark brown, 
in each of which all the tentacles have the same colour, whereas in the lighter 
patches the tentacles are translucent pale brown, the upper part being banded 
with brown and white on their oral aspects. 
Dimensions.—Diameter of basal disk about 44 mm.; height of column, 
28 mm.; average diameter of column, 18 mm. 
Habitat—Shell of Dolium, inhabited by a hermit crab; from surface of 
reef, Mer. 
The salmon-coloured acontia were emitted chiefly through the basal cinclides, 
but also from the mouth. 
This species is allied to Adamsia decorata. 
Unfortunately the single specimen of this species was lost, but there is no 
doubt as to its generic name. 
TRANS. ROY. DUBL. SOC., N.S. VOL. VI., PART XVI. Sik 
