462 . Happon—The Actiniaria of Torres Straits. 
Paraphellia lineata, H. & 8. 
Pavraphellia lineata, Hadd. and Shackl., 1893; Proc. R. D.S8., vu, p. 130. 
(Pl. XXIII., figs. 27, 28; Pl. XXIX., figs. 10, 11.) 
Form.—Column slightly higher than broad, smooth; pedal and oral disk 
somewhat wider than column, both of about same diameter; tentacles very short, 
with a symmetry of six, about 100 in number (probably 6 + 6+ 12 + 24+48=96; 
mouth linear, with two gonidial grooves, an oral cone may be present. 
Colour.—Column grey, sparsely speckled with pale brown; insertion of 
mesenteries show as alternate white and yellow lines; oral disk white, with 
numerous radial fine brown lines; the oral third (that which may be raised into 
the oral cone) of each radius with a thin central brown line, and near the base of 
the tentacles is a row of some half-dozen dark-brown spots: in the 12 primary 
radii, these fuse more or less to form a line; tentacles with a dark cloudy spot or 
core, at apex, upper third with several opaque rings; some are coloured with 
translucent red-lead at base, others are brown; most with five dark spots on each 
side; cesophagus buff; gonidial grooves pink. 
Dimensions.—Height of column about 25 mm. 
Habitat.—Between Orman’s Reef and Gaba (Brother’s Island), 6-7 fathoms. 
This species can be readily distinguished externally from P. Hunti, and 
equally so by the character of the sphincter muscle. The only histological 
character that calls for any notice is the queer behaviour of the mesoglea of the 
mesenteries ; this often swells out at the base, and forms broad expansions which 
appear to enclose patches of the endoderm; the mesoglcea of the mesenteries 
sometimes shows a tendency to branch ; but these may be artefacts due to imperfect 
preservation, or to faulty subsequent treatment. 
The sphincter muscle is very characteristic ; it is formed of a compact series of 
elongated and slightly branched muscle cavities, which, with a low power, give it 
a decidedly striated appearance (PI. xx1x., figs. 10, 11). 
PHELLIACTIS, Sim. 
Chondractiniine of large size, with a very thick, smooth body-wall; scapus with 
a very delicate cuticle; capitulum naked ; tentacles small, all with a thick rounded 
abaxial swelling. 
P. Hertwigii, Simon (1892, Kin Beitrag zur Anat. Syst. der Hexactinien, p. 75) 
Simon describes, but gives no figures of this new genus and species; 
undoubtedly belongs to this sub-family as defined above; future investigations 
will show whether the genus will stand. 
