494 Happon—The Actiniaria of Torres Straits. 
broad white line radiating from the mouth to about a quarter or one-third 
the diameter of the disk; the secondary radii have similar but shorter white 
lines. 
Dimensions.—The diameter of the corona is about 230 mm. (9 in.). 
Habitat.—Torres Straits. Unlike the two species of Actinodendron, this 
species prefers the shelter of some rocky or coral boulder to sandy flats and 
full sunshine. It does not possess the distinet urticating properties of Acti- 
nodendron. 
The above description is compiled from Saville-Kent’s descriptions, as I am 
not acquainted with the form. It appears to be distinct from the only other 
recorded species of the genus, MW. Hemprichii, Ehr. The latter species is described 
and figured as haying twenty tentacles (10 + 10), but this may be an individual 
peculiarity. 
Klunzinger describes the ultimate branches of the tentacles as being club- 
shaped in the species from the Red Sea, whereas, judging from Saville-Kent’s 
photograph, these have poimted ends, and have altogether quite a different 
character from those of the older species. 
? ACREMODACTYLA, Kwietn. 
Actinodendridz with a smooth body-wall, no marginal fold. The pedal 
disk is not sharply separated from the column. The tentacles comparatively 
large, in several cycles, covered with numerous branched prolongations. The 
angles of the mouth with strong triple swellings. All the mesenteries perfect and 
provided with gonads. Sphincter absent. 
Acremodactyla Ambonensis, Kwietn. 
Kwietniewski (Inaug.-Dissert., 1897, p. 19) describes a new genus and species 
which he terms Acremodactyla Ambonensis. There are forty-eight tentacles and 
twenty-four pairs of mesenteries. As mentioned above, he regards this form 
as the type of a new family. The question must be left for the present whether 
the ‘‘ arms” are true tentacles with branches or tentacle-like prolongations of the 
oral disk which bear the reduced tentacles. 
? ACTINOSTEPHANUS, Kwietn. 
Actinodendridz very similar to Acremodactyla, but with numerous conical 
prolongations of the tentacles, and with the directive mesenteries sterile. 
