A. W. WATERS—REPORT ON THE BRYOZOA. ie) 
but these are not readily made out. A specimen in my collection from 
Hastings, sent to me by Miss Jelly, and therefore to be considered as a 
co-type, has one such ovicell. It is therefore now quite clear that I was 
right in removing from Cellepora to Lagenipora a group with this form of 
ovicell ; and Lagenipora must include Cellepora Costazui, Aud., C. granwn, 
Hincks, &e. This is dealt with in my paper on Bryozoa from Madeira, 
Journ. R. Mier. Soc. 1899, p. 13. -16¢h October, 1908. AGINVES VE) 
Rerepora utrsuta, Busk. (Plate 18. figs. 24-26.) 
cut, fig, 29 (1884). 
The zoarium is more or less cup- or perhaps saucer-shaped; the fenestra 
are small, about the width of the branches. The zocecia are distinet, with 
smooth surface and a few pores at the side. The peristome rises at the sides, 
and sometimes quite meets, forming a pore. In one or two cases there is an 
avicularium in the peristome, but this is rare, and it is also very rare to find 
any small avicularia on the anterior surface. Busk figures numerous ayvic- 
laria, but they do not occur in my ‘Challenger’ specimen. The oral 
aperture has a small sinus, but a corresponding projection is not found 
on the operculum, as the sinus is formed by the double ridge within the 
peristome, to which I have referred as occurring in various feteporw and 
some Smittiov. 
There are some avicularia in the fenestrae, and sometimes also on the 
anterior wall of the zocecium, in which the end is divided and raised. ‘This 
kind of bifid avicularium is frequent in the monilifera-group. 
The spines are thin and smooth, and this is also usually the case in the 
‘Challenger’ specimen already referred to, though in that they are sometimes 
much stouter ; and also in the specimen mentioned there are only two oral 
spines, whereas Busk gives five. However, in my ‘ Challenger ’ specimen 
although most of the spines are smooth, one is antenniform as described by Busk, 
who considered it as characteristic of the species. Thus we see what a difficult 
section of Retepora this is, as many of the characters are only seen in isolated 
cases. The ovicell is of the monilifera type with the stigma very wide, both in 
the median and curved lower portion, and there is sometimes a small semi- 
circular avicularium near the distal end of the ovicell. There are 11 tentacles. 
This species is very much like &. monilifera, var. umbonata, MacG., and 
perhaps that name should be used. The Australian specimens of var. umbo- 
nata are much stouter, and have semicircular or ovate avicularia surrounding 
the fenestree as well as the bifid form. 
Loc. Cape York, Torres Straits, Stat. 186 (Chall/.) ; Red Sea, Tata toe ING. 
long. 41° W., 30 fath., collected by Liffler & Siemens; Zanzibar (Cross- 
land). 
