Happon—The Actiniaria of Torres Straits. 483 
tentacles: ‘‘simple tentacles elongated, moderately stout, tapering, arranged in 
about three crowded rows, and quite numerous.” Were it not that the simple 
tentacles are described as elongated and tapering, I should have no hesitation in 
regarding this generic name as a synonym of Cryptodendrum. It must be 
remembered that Verrill had only preserved material, and no anatomical details 
are to hand. 
Probably Sarcopniantuus, Less., belongs to this group, but we have not suffi- 
cient information respecting it. 
CRYPTODENDRUM, Klunz., 1877. 
Thalassianthidze, with a smooth body-wall, or with small suckers on the upper 
portion of the column; a greatly expanded oral disk, which has its margin entire. 
Tentacles of two kinds: (1) very numerous, short branched tentacles disposed in 
radial groups on the general surface of the oral disk, and also in a single row along 
the periphery of the disk; immediately within the latter is a fairly broad band of 
short, thick, knob-like, adhesive tentacles. The edge of the column (capitulum) 
crenulated by the insertions of the mesenteries, but there are no acrorhagi. 
Mouth, large, rounded, cesophagus with two gonidial grooves. Strong, circum- 
scribed, endodermal, sphincter muscle. 
C. adhesivum, Klunz. 
Cryptodendrum adhesivum, Klunz. 
Cryptodendrum adhesivoum, . Klunzinger, 1877, ‘‘ Die Korallthiere des Rothen 
Meeres,” p. 86, Taf. vr., fig. 4; Studer, 1878, 
Monatsber. KK. Preuss. Akad. Wiss. Berlin, 
p. 545; Kwietniewski, 1895, Jenaische Zeitschr. 
xxx., p. 600, Tat. xxvi., fig. 15;, Hadd. and 
Shackl., Proc. ;R., Ds 8... (N. S:)) wai.;, 1888, 
pe dls 
(Pl. XXV., figs. 4-6; Pl. XXXII, figs. 5, 6.) 
Form.—Body-wall thin, with numerous small suckers in the upper portion of 
the column; the upper edge of the column is crenulated by the mesenteries, but 
there are no marginal spherules. Column short; pedal and oral disk expanded, 
latter irregularly folded, entirely covered with tentacles, except for a narrow 
space round the mouth ; the oral disk is feebly and very slowly retractile, but it 
: 4A2 
