198 
Mr. A. W. Waters on the 
neighbourhood of Sydney and Adelaide, in which the peri¬ 
stome is similarly divided ; but the avicularia are sometimes 
more raised, and the cells bristle with raised projections, mostly 
avicularian. In the Australian specimens there is a wide 
denticle in the peristome above the oral aperture, similar to 
that shown in C. lohulata (fig. 3), while in the Naples speci¬ 
mens I have only seen a narrow, somewhat acute denticle. 
The shape of the opercula, young cells, and ovicells I can 
only give from the Australian specimens, but fully expect that 
future u finds ” in the Mediterranean will show they are 
identical. 
The exterior cells are ovate, elongate, and have a projecting 
mucro in front of the lower lip, and, in one stage, exactly re¬ 
semble the figures of Lepralia bispinosa in the B.M. Cat. 
lxxx. fig. 1 ; then similar projections appear at the side and 
on the front of the cell, and gradually the characteristic digi¬ 
tate appearance is assumed. The ovicells are globose, imper¬ 
forate, wide, and have one or two blunt spines or umbos on 
the top. 
Opercula: distal edge formed by an arc of a large circle, 
proximal edge by an arc of a smaller one 5 somewhat similar in 
shape to those of C. avicularis (12*), with a coarse cellular 
appearance. Width 008 millim., length 0*076 millim. 
72. Cellepora lobulata , sp. nov. (PI. XIV. figs. 3, 4.) 
Peristome evenly raised from a flat surface, divided all 
round into several lobes. The young cells are slightly granu¬ 
lar, and have oral avicularia which turn slightly over the 
aperture; in the young cells there are six spines. The old 
cells (fig. 3) show little resemblance to most Celleporidas, 
while the younger ones, in the position of the avicularia, 
indicate this affinity. 
73. Cellepora pumicosa, Busk (non Linne). 
Cellepora pumicosa, Busk, Marine Polyzoa, pt. ii. p. 86, pi. cx. figs. 2-6. 
Cellepora ceratomorpha, Rss. Foss. Polyp, d. Wiener Tert. p. 80, pi. ix. 
fig. 25, a,f. 
There is no doubt that this is not C. pumicosa of Linne, 
who refers to Marsigli’s figure of C. coronopus , which I have 
seen named in several continental museums as pumicosa ; and 
it is therefore unfortunate that Mr. Busk has given this name 
to the present species; but as he gave a detailed description 
it would be unadvisable to revert to the original signification. 
Opercula orbicular, the proximal edge is the arc of a circle 
slightly smaller than that of the distal edge ; width 0*13 millim., 
length 0*12 ; muscular impressions 0*065 millim. apart. 
