Mr. A. W. Waters on Australian Bryozoa. 5 
I have not been able to satisfy myself as to its signification. 
In no other case does an ovicell seem to have been described, 
Cribrilina clithridiata, Waters. (Pl. I. figs. 6-9.) 
Cribrilina clithridiata, Waters, Ann. & Mag. Nat. Hist. ser. 5, vol. xx. 
p. 187, pl. v. fig. 6, pl. vi. fig. 2. 
In the material from Green Point there are several speci- 
mens with ovicells which are globose, large, much raised, 
with a large mark on each side, called a “‘ pyritorm fossa” by 
Hincks and a “ large stigma” by Busk, being similar to the 
ovicells of C. philomelaand C. figularis. On the upper part 
of the ovicellular elevation, though above the ovicellular 
chamber, there are six marks or papille similar to those on 
the front of the zocecium. The aperture of the ovicelligerous 
cells is subquadrangular, exactly similar to that of the 
ordinary zocecia of C. figularts, and this is a point which 
should be kept clearly in view when considering the classifi- 
catory position. 
When C. clithridiata is decalcified there are conspicuous 
marks on the front, like the fenestree of the Catenicelle (much 
as in C. ventricosa), and the central area is thicker, forming 
a kind of shield; but there are no other marks, whereas in 
C. jfigularis (fig. 10), C. latimarginata, &c. when decalcified 
there are marks corresponding to the rows of punctures in the 
calcareous wall. The “ fenestra”? are of course under the 
papille at the end of the ridges. 
Cribrilina radiata, Moll. 
For synonyms see Hincks, Brit. Mar. Polyzoa, p. 185. 
A specimen from Green Point is a typical C. radiata, in 
shape and size similar to specimens from Naples. There are 
five ribs on each side and a central one below. The ovicell 
has a keel, 
MacGillivray mentions the species in his ‘ Catalogue of 
Marine Polyzoa of Victoria,’ p. 22; but it does not appear 
to have had any other notice from the Australian area. 
Microporella coscinopera, var. armata, Waters. 
FS ad 
(PI. 1. figs. 1-5.) 
Microporella coscinopora, var. armata, Waters, Quart. Journ. Geol. 
Soe. vol. xxxvii. p. 331, pl. xv. fig. 25; ‘Challenger’ Suppl. Rep. 
QC 
p- 39. h i 
Microporella coscinopora, var. mucronata, Waters, Quart. Journ. Geol. 
Soe. vol. xli. p, 20. 
