Happon—The Actiniaria of Torres Straits. 481 
RICORDEA D. & M. 
Ricordea, . . . Duch. et Mich., 1860; MeMurrich, 1896, p. 46; Andres, 
1884, p. 360. 
Homactis, . . . Verrill, 1868, Proc. Essex Inst. vi., p. 70. 
Heteranthus, . . (Klunz.) MeMurrich, 1889, p. 46. 
?Phialactis,. . . Fowler, 1889, Quart. Journ. Micr. Sci., p. 148. 
Rhodactide, with the oral disk covered with radially disposed tuberculiform 
tentacles. Sphincter absent (?). 
MeMurrich has discussed this genus (1889, p. 46); at first he discarded 
Duchassaing and Michelotti’s name, adopting that of Klunzinger, but sub- 
sequently (1896, p. 188) he returned to the path of taxonomic virtue. I do not 
agree with him in making Heteranthus a synonym of MRicordea. In a later 
paper (1897, Zool. Bulletin, 1., p. 119) he states that one specimen of R. florida 
had only one pair of directive mesenteries, and in another none were present. 
I have no personal acquaintance with this genus; but it appears to me that 
the form described by Dr. Fowler under the name of Piialactis neglecta must be 
placed here. The chief points of difference between his species and R. florida 
are the absence (?) of crenulations to the oral disk (which, by-the-by, Duchas- 
saing and Michelotti themselves overlooked), and the group of the globular or 
tuberculiform tentacles ‘‘spheeridia,” on the oral cone. I am inclined to think 
that Verrill’s Déscostoma fungiforme, from Bonin Islands, south of Japan, is 
another species of this genus (I. c., 1868, p. 70), and I have very little doubt that 
Homactis rupicola, Verr., from Hongkong is one also. 
R. florida,. . Duch. & Mich., 1860. 
R. rupicola, . (Verr.), 1868. 
R. neglecta, . (Fowl.), 1889. 
HETERANTHUS, Klunzinger, 1877. 
Rhodactidz, with short, but distinct marginal tentacles, forming a single row, 
and with the oral disk covered with tuberculiform tentacles arranged radially. 
Upper portion of the column with verruce. 
This genus, with the disk tentacles reduced to mere papille, is very closely 
allied to Ricordea; indeed for some time I did not separate them, but the 
presence of marginal tentacles is a fair diagnostic character. In his species 
Klunzinger describes the margin of the disk outside the tentacles as being 
TRANS. ROY. DUB. SOC., N.S. * VOL. VI., PART XVI, 4 A 
