Happon anp Durrpen—Some Actinaria from Australia and other Districts. 149 
littoral region” from the “‘ Hast American littoral region” (which includes the 
West Indies), and also from the ‘‘ Guinea sub-region” of the ‘‘ West African 
littoral region.” Dy. Ortmann allocates the littoral fauna of Cape Colony to 
the ‘‘ Antarctic littoral region,” which, in this case, separates the littoral fauna of 
East Africa from that of West Africa. 
MacrocneMIN&. 
EPIZOANTHUS, Gray, 1867. 
Epizoanthus egerie, nN. sp. 
(Pl. viz, fig. 5.) 
Form.—Polyps scattered. The column is short, rising very little in the 
contracted condition above the ccenosare, encrusted with foraminifera, which 
give it a granular appearance. Upper surface of contracted column with from 
12 to 18 wedge-shaped radial ridges ; mouth aperture open in most. 
Ccenosare thin, incrusting, continuous, of the same nature as the wall of the 
column. 
Colour.—The natural colour is removed by alcohol, leaving them a pale 
grayish buff. 
Dimensions—Height, 1-2 mm. above the surface of the conosarc; average 
diameter 5 mm. 
Locality.—Macclesfield Bank, about mid-way between Cochin China and 
Luzon, in the South China Sea. Depth 45 to 47 fathoms; dredged by H. M.S. 
“‘Kgeria” ; collected by P. W. Bassett-Smith, Surgeon, R.N. 
There are two colonies, each incrusting almost the entire surface of two shells 
of Murex tenuispina. The ccenosare also passes in and incrusts for some distance 
the mouth of the shells. In the larger specimen the polyps are more crowded on 
the oral aspect of the shell and along the varices. 
Commensal with hermit-crabs. 
Body-wall.—The ectoderm is continuous, except where interrupted by the 
incrustations. It is covered by a thin cuticle, upon which diatoms are very 
abundant. Large dark-brown oval nematocysts are numerous in some parts. 
Four polyps were sectionised for study, and the extent to which these dark 
nematocysts occur varies much in the different individuals. 
The incrustations are very abundant, and consist largely of foraminifera and 
other calcareous material. A few siliceous sponge spicules occur. Owing to 
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