482 Havpvon—The Actiniaria of Torres Straits. 
furnished with warted papille (vdelwarzigen Ldppchen) or clusters of small 
thickly-crowded pigmented tubercles. 
Homactis rupicola, Verrill, is allied to this; but it would, perhaps, be safer to 
regard it as a species of Ricordea, as the marginal ‘“ tentacles”? appear to be very 
small, broad, and flattened ; in fact, they may very well be what I describe as 
the crenulations of the disk. 
Heteranthus verruculatus, . . . Klunzinger, 1877; Korallth. Rothen Meeres, 
p. 84, Taf. 5, fig. 9. 
Family.—THa.asstantHip&, M°M. 
Stichodactylinz, with an entirely smooth body-wall, or with verrucz, on the 
upper portion of the column; a greatly expanded oral disk, which may be 
thrown into definite and permanent lobes; tentacles of two kinds, branched or 
fimbriated, and globular; a circumscribed endodermal sphincter muscle. 
I think it will be found that the following genera fall into fairly natural 
groups :— 
CrypropeNprUM, . margin of the oral disk entire; the globular tentacles form 
a complete sub-marginal ring. 
HereropactyLa, . margin of the oral disk entire or thrown into irregular, 
inconstant lobes; the globular tentacles form an inter- 
rupted ring. 
ACTINERIA, . . . margin of the oral disk thrown into very numerous small 
permanent lobes, each of which bears numerous short 
plumose tentacles on its oral aspect, and a group of 
globular tentacles on its aboral aspect. 
THALASSIANTHUS, . margin of the oral disk thrown into elongated, tentacle- 
like, permanent lobes, each of which bears moderately 
long serrated tentacles on its oral aspect, and a group of 
globular tentacles on its aboral aspect. 
In his ‘‘ Synopsis of the Polyps and Corals of the North Pacific Exploring 
Expedition” (Proc. Essex Inst., Salem, vi. 1868 (1870), p. 67), Verrill thus 
describes the new genus AmpuHtactis: ‘‘ Base broad, column covered with promi- 
nent verruce, arranged in vertical lines. Simple tentacles in several rows sub- 
marginal, with compound and much sub-divided, short, tentacle-like organs both 
outside and inside of them; the latter covering the disk more or less completely.” 
A. orientalis, Verr.,n.sp., Bonin Is. On the next page he describes the simple 
