Hapvpon—The Actiniaria of Torres Straits. 449 
wall soft; no tubercles, but verrucze (suckers) may be present in the upper part of 
the column; cinclides present (chiefly ectodermal invaginations); one or two 
gonidial grooves; strong mesogloeal sphincter muscle. 
The following genera have been placed in this sub-family :— 
Sagartia, Cylista, Gephyra, Cereus (Heliactis), Nemactis. 
SAGARTIA, Gosse. 
Sagartiine with a smooth body-wall, or with small verrucze, in the upper portion 
of the column ; moderately long tentacles in several cycles around the margin of 
the oral disk, which is not greatly expanded. 
Carlgren does not distinguish between the genera Sagartia aud Cylista as he 
finds the presence or absence of suckers to be variable. 
Sagartia Milmani (H. & S.). 
Thoe (?) Milmani, Hadd. and Shackl., 1893; Proc. R.D.S. vu. p. 130. 
(Plate XXIII., fig. 16; Plate XXIX., figs. 1-5.) 
Form.—Body soft; large pedal disk ; oral disk not greatly exceeding diameter 
of column; tentacles, moderately short, numerous, in four or five cycles; mouth 
oval. 
Colour.—Column ofa smoky yellow colour, sparsely speckled with dark brown; 
tentacles pale lemon yellow below, with a central, broad, ash coloured band, and 
translucent white above. 
Dimensions.—Diameter of corona, 30 mm. 
Habitat.—Albany Pass, Cape York, 10 fathoms. 
The mesoglcea is not very thick, but it is sufficiently firm to prevent the body 
from collapsing when preserved in alcohol. The ectoderm and endoderm are 
thin; the latter does not contain zooxanthelle. The ectodermal and endodermal 
musculature of the oral disk is well developed ; the mesoglceal plaits of the former 
being especially so, and are long and branched. 
The sphincter muscle (PI. xxrx., fig. 1) is very long, and for the greater 
part of its length consists of but few muscle-cavities (Pl. xxix., figs. 8, 4), 
but superiorly (distally) there is quite a cluster of cavities (Pl. xxix, 
fig. 2). 
TRANS. ROY. DUB. SOC., N.S. VOL. VI., PART XVI. 8U 
