a General History of the Marine Polyzoa. 127 
Family Celleporide. 
CELLEPORA (part.), Fabricius. 
Cellepora granum,n. sp. (Pl. ILI. fig. 8.) 
Zocecia erect, ovoid, smooth, distant, those of the uppermost 
stratum more or less separated by the cells of the one below 
it; orifice quite terminal, suborbicular, with a very marked 
pointed sinus ; peristome elevated around it and carried up in 
front into a tall central rostrum, which bears at the top on its 
inner aspect a small oval aviculariwm; peristome on each side 
of the rostrum rising into a point. Occvum rounded, smooth, 
a flattish semicircular space on the front bounded by a raised 
edging and traversed by radiating lines. Zoartwm forming 
small subglobose patches. 
Loc. Off Curtis Island, common. 
Family Selenariidez, Busk. 
Lunvuites, Busk. 
Lunulites incisa, n. sp. (PI. IV. figs.1-3.) 
Zoarium conical, well raised; beneath flat, divided into 
lobes round the edge, porous. Zowcial orifices occupying a 
kind of furrow between the lines of avicularia, separated 
by short spaces, depressed, the cell-wall rising around them, 
elliptical, with a narrow well-marked sinus on the lower 
margin. Avicularia short, suberect, pointed; mandible pro- 
bably triangular, turned in different directions. 
Loc. Bass’s Straits. 
This fine species probably belongs to the same group as the 
L. cancellata and philippensis of Busk, which agree with it 
in the cancellated structure of the zoarium, and should no 
doubt be dissociated, as suggested by Busk, from the other 
members of the genus. The diagnosis in the British-Museum- 
Catalogue of the two species just named, however, does not 
give any detailed account of the structure of the orifice ; and 
it is therefore impossible to determine their exact relation to 
the present form. 
In the specimens of L. incisa which I have examined the 
mandibular portion of the appendages is wanting ; but, from 
the form of the fixed base (beak), there can be no doubt that 
they are avicularia; and if so, in this respect the species 
differs from the other recent forms, and agrees (so far) with 
Conescharellina of D’Orbigny. 
