Happon—The Actiniaria of Torres Straits. 399 
Hexactinrz.—II. Sricnopactyninz—continued. 
Rhodactide: Rhodactis Howesii, 8.-Kent ; Actinotryx bryoides, 
(H. & 8.); A. mussoides, (S.-Kent). 
Thalassianthidee: Cryptodendrum adhesivum, Klunz; Hetero- 
dactyla Hemprichii, Ehr.; H. hypnoides, 8.-Kent; Acti- 
neria dendrophora, H. & 8. 
Actinodendride : Actinodendron plumosum, un. sp.; A. glome- 
ratum, n. sp.; Megalactis Griffiths’, 8.-Kent. 
Phymanthidee : Phymanthus muscosus, H. & 5 
ACTINIARIA, or MALACODERMATA. 
Ceelenterata, with various kinds of tentacles arranged in diverse manners, and 
with usually numerous mesenteries which are mostly in some multiple of six. With 
no spicular or continuous skeleton. Body moving freely or adhering to supporting 
substances by means of suction of the pedal disk; rarely firmly fixed; animals 
usually solitary, rarely forming colonies. 
Tribe I1—EDWARDSLA, R. Hertwig, 1882. 
Free-moving, non-colonial Actiniaria, with eight mesenteries, two pairs of 
which are directives; the remaining mesenteries are unpaired, and their retractor 
muscles all face the same way; all the mesenteries are fertile; tentacles simple, 
usually more numerous than the mesenteries. 
Family.—Epwarpsup&, Andres, 1880. 
This family has recently been studied by Carlgren, and I have no new obser- 
vations to record. I believe that my Swedish friend has now discarded his new 
family of Milne-Edwardsiide, but has two new genera to add to those given above. 
No specimen of this tribe is recorded from Torres Straits. 
Edwardsia, Quatr., 1842; Edwardsiella, Andr., 1884; Edwardsioides, Danl., 
1890; Milne-Edwardsia, Carlgr., 1893. 
Tribe II.—CERIANTHEA, R. Hertwig, 1882. 
Actiniaria, with numerous pairs of mesenteries so arranged that each mesentery 
of the one side of the directive mesenteries forms a pair with the corresponding 
one on the other side. A single anterior (or dorsal) cesophageal groove. The 
mesenteries at the anterior end of the polyp (on the dorsal side) are the longest, 
