Happon—TVhe Actiniaria of Torres Straits. 437 
DIPLACTIS, M°M. 
Phyllactidz in which the fronds are represented by a single cycle of short 
digitiform processes, and in which all the mesenteries except those of the first 
eycle are gonophorie. 
M*Murrich (Proc. Acad. Nat. Sci. Phila., 1889, p. 110) defines his new genus 
as above ; there is a well-marked diffuse endodermal sphincter between the papil- 
late acrorhagi and the tentacles, the mosoglceal process of the sphincter are rather 
delicate and anastomose somewhat in their proximal portions. The column is 
smooth. 
D. Bermudensis (M°M.),. (4. ¢. p. 111, 1896, p. 186). 
D. delicatula (Hertw.), . (= Hormathia delicatula, Hertw. Suppl. Chal. Rep. 
1888, p. 15), fide M*Murrich, 
D. aster (Ell.), . . . (= Actinia aster, Ellis, 1786; D. & M., 1866) MeM. 
1896, p. 187. 
D. depressa (D. & M.), . (= Anemonia depressa, D. & M., 1860) may be the 
same species as D. Bermudensis. 
HOPLOPHORIA, Wils. (? Viatrix, D. & M., fide M*Murrich). 
Phyllactidze with a pedal disk. Column smooth, without cinclides. Capitular 
margin provided with prominent club-shaped acrorhagi. Tentacles not very 
numerous, of moderate length ; sphincter muscle diffuse, very feebly developed (or 
absent ?). Six pairs of perfect mesenteries, some of which may be fertile. No 
acontia. 
This genus was instituted, but not defined, by Dr. H. V. Wilson, in 1890, for an 
Actinian he collected at the Bahamas. M*Murrich, however, says: ‘ It seems fairly 
certain” that this species ‘‘is identical with the Viatrix globulifera originally described 
by Duchassaing and Michelotti” (1893, 133, footnote), and again, 1896, p. 186, he 
makes the same assertion. It was in deference to MeMurrich’s verbal statement 
to the same effect that, in the preliminary Report (1893, p. 127) with considerable 
hesitation, I adopted this conclusion. There is no doubt that Dr. Wilson’s species 
and the present one are closely allied. We must await the rediscovery of Viatriz 
globulifera before this point can be finally settled; but in the mean time I must 
accept Hoplophoria as a recognised genus. Viatrix globulifera appears to me as if 
it might very well be a young stage of Cystiactis Eugenia. (D. & M., 1866, p. 129). 
Hoplophoria coralligens, Wilson. 
cincta (H. & S.). 
) 
