20 Mr. A. W. Waters on Australian Bryozoa. 
There are some specimens from Green Point larger than 
the one previously mentioned, and they are more ‘strongly 
calcified. In the most typical 0. granum the peristome is not 
continuous, but carried up in ‘front; and in one specimen 
from Green Point the peristome is in some zocecia continuous, 
in others merely projects in front as if one half had been cut 
away, giving avery different appearance to the zocecia. The 
same thing occurs in the Naples form (see Ann. & Mag. 
Nat. Hist. ser. 5, vol. iii. p. 195). 
In the Green Point specimens there are large vicarious 
avicularia with the mandibles very wide at the distal end , just 
as in C. Costazii, Aud. 
There seems to be a group of Cellepore with subglobular 
ovicells part way up a somewhat tubular zocecium ; the ovi- 
cells have a distinct area surrounded by elongate or "radiating 
pores. They are known as C. granum, H., C. Boryti, Aud., 
C. Costazit, Aud., C. Hassallit, Johnst., C. costata, MacG., 
C. retusa var. caminata, W aters, Gis platalea, MacG., Lageni- 
pora nitens, MacG., L. spinulosa, H., Phylactella lucida, H., 
C. rota , MacG.., C. rudis, B., C. bilabiata, B., C. signata, B. ; 
but these should be reduced to two or three species. 
In Cellepora perhaps we may see the signification of the 
perforated area on the ovicell which occurs in so many species. 
As growth of the colony progresses the ovicell becomes more 
and more immersed, often nothing being seen of it except the 
perforated Palcencon: wall of the area, and no doubt a readier 
communication with the surrounding water is thus maintained 
to the last. ‘There are, however, many species in which the 
ovicell has only a lunar mark of thinner structure ; this may 
be a degenerated form of the perforated area, where a less 
erect growth of the zocecia has made the perforation of less 
importance. 
A somewhat similar structure occurs in other genera, and 
then all except the area may become immersed, as, for in- 
stance, in Smittia marmorea. 
Stomatopora tncrassata, Smitt. 
A A aaa Hincks, Brit. Mar. Polyzoa, p. 436, pl. lix. 
gs. 2,8 
The Green Point specimens are no doubt identical with the 
form described by Mr. Hincks; but as I am not sure about 
other descriptions reference is only made to his. 
The branches anastomose, and from various parts erect 
“¢ cylindrical processes” riseup. These erect fasciculi remind 
us of ee a bellis, MacG. (see Ann. & Mag. Nat. Hist. 
ser. 5, vol. xx. >. 259) ; but in the latter they are about 
