148 Happon anp DuserpEN—Some Actiniaria from Australia and other Districts. 
outlines of their contours appears to us to be very different from Klunzinger’s 
species, and we therefore would propose the name of P. capensis for this 
form. 
We have had considerable difficulty in deciding (1) whether our forms were to 
be regarded as belonging to one or two species, and (2) having provisionally 
decided in favour of the latter alternative, whether either was a new species or 
not. Asthe polyps are not distinctly polygonal in contour, we do not think either 
of our forms is P. capensis. We have carefully compared our specimens with 
Klunzinger’s description, and find many points of resemblance and a few diffe- 
rences, the most important, perhaps, being that, in the latter, the polyps are less 
crowded. On the whole, then, we have decided to erect two new species, and so 
we must leave them till the group can be thoroughly investigated. 
A list of the other species of this genus will be found on p. 631 of the 
‘Revision of the British Actinie, u. The Zoantheze.” Dr. G. Miiller (1888) 
described the following species :—P. tuberculosa, Klunz. (Red Sea), P. sp. (Phoenix 
Island, Pacific Ocean, about lat. 5 S., long. 175 W.); P. calearia, n. sp. (Fiji 
“‘ Viti”), P. sp. (Samoa), P. sp. (Rolas Island, Gulf of Guinea*), P. sp. (Rolas), 
P. sp. (Rolas) ; unfortunately he does not give any figures. 
The available information about this peculiarly difficult genus is at present too 
slight for us to profitably enter at length into a comparison of the various species. 
Judging from the figure given in the atlas (pl. xi, figs. 13, 14), neither of our 
species is P. lutea, Q. and G. (Tongatabu), as in the latter the polyps are more 
scattered. They also appear to differ from P. aggregata, Lesson (Society Archi- 
pelago), and P. cesia, Dana (Fiji). Studer (1878, p. 547), without describing or 
figuring a species he collected at New Ireland, recorded it as P. tuberculosa, Esp. 
s. Klunz. They differ from P. Kochi, Hadd. and Shackl. (Torres Straits), by the 
incrustations being distributed throughout the mesoglcea, and not in a layer; the 
lacunze and cell-islets are much more numerous; the the polyps project less, 
and there are only 15 capitular ridges instead of 20. In P. Howesii, H. and 
S. (Torres Straits), the polyps project more on one side; their diameter is 7 mm. ; 
the mesoglcea of the cesophageal groove is thickened, and the incrustations are 
calcareous. They differ from P. cwsia (?), Dana (Torres Straits), by the smaller 
diameter (5 mm. instead of 9mm.) of the polyps, their greater crowding, and, in 
the latter the endoderm is thrown into ridges. These three species are figured on 
PIP ix, “rans. ke Se lve, Logie 
It is improbable that any of the West Indian species occur in the Indian 
Ocean, and, on other grounds, we may dismiss those forms. 
In his recently published paper (‘‘ Grundziige der marinen Tiergeographie ” 
Jena, 1896), Dr. A. E. Ortmann recognises the distinctiveness of the ‘ Indo-pacifie 
* We cannot identify this island. 
