436 Havvon—The Actiniaria of Torres Straits. 
(1884, p. 287) and confirmed by M*Murrich in 1889 (Proc. Acad. Nat. Sci. 
Phila. p. 105) and in 1893 (p. 196). 
In his paper on the Actiniaria of the Bahama Islands (1889, p. 55), M*Murrich 
regarded this family as one of the Stichodactyline ; but very shortly afterwards in 
a paper on the Actinology of the Bermudas (1889, p. 105), he removed the family 
to the Actiniinz, for the very good reason that the sphincter muscle lay between 
the tentacles and the fronds; the latter thus belong to the category of acrorhagi. 
The following genera may be placed in this family :— 
Phyilactis. Diplactis. 
Oulactis. Hoplophoria. 
Cradactis. Asteractis. 
Phyllodiscus. 
PHYLLACTIS, M. Edw., 1857. 
Phyllactidze with a smooth column and a small oral disk; the acrorhagi are 
frondose. 
Phyllactis pretexta, Dana; P. cichoracea, Hiick. 
OULACTIS, M. Edw. & H., 1851. 
Phyllactidze in which the column is provided with longitudinal rows of ver- 
ruc in ifs upper part; the fronds are foliose. Sphincter muscle more or less 
circumscribed. 
The above definition is that given by MeMurrich (Proc. U.S. Nat. Mus. xvi., 
1893, p. 196). This genus appears to differ externally from Phyllactis only by 
the possession of verruce. 
O. concinnata (Dana); O. muscosa(Dana); 0. flosculifera (Les.), (= 0. conquilega, 
D. & M., Pl. vi. fig. 7; O. foliosa, Andr.: ef. M*Murrich, 1889, Journ. Morph. u1., 
p- 56); O. formosa (Duch.); 0. radiata, D. & M.; O. ornata (Verr.), ( = Lophactis 
ornata, Verr. fide M°M. 1893, p. 197); O. Californica, MM. (1893, p. 196). 
CRADACTIS, MM. 1893. 
Phyllactidee with the fronds represented by bunches of simple or slightly 
branched, short, tentacle-like structures. Sphincter aggregated or circumscribed. 
Column with verruce. 
C. fasciculata, M*M. ( Oulactis fasciculata, M‘M., 1889, Proc. Acad. Nat. Sci. Phila., 
p. 108; 1893, p. 197); C. digitata, M°M., 1893, Proc. U. 8. Nat. Mus. xvr., p. 198. 
