VINE : CAMBRIDGE GEE ENS AND. 
19 
prominent, cells not wholly contiguous, sparsely punctured. Ocecia 
an inflated cell (?) 
Locality: Cambridge, Greensand. 
This is by far the most abundant of the whole of the Diastoporae 
of the Jesson collection. Before deciding to characterise this and 
the following species as new, I examined a large series of British 
specimens of Oolitic and Cretaceous Diastopora, but I could not find 
that any of these possessed similar facial characteristics ; then again 
every available figure of foreign Greensand species was examined 
with like results, and although Novak figures several species of 
Berenicea I could only identify one of the Cambridge species as 
referable to forms described by the author. In a semi-transparent 
section of D. fecuiida which I have prepared, the peculiar structural 
features of the species are very apparent. The super-imposed colonies 
originate from marginal cells, and the initial stages of a new colony 
is flabellate and ultimately disciform, the new colony entirely 
obliterating or covering up the original. 
11. — Diastopora megalopora sp. nov. Plate II., figs. 9 to 9e. 
Zoarium circular or nearly so, far more robust than D. fecunda, 
but proliferous. Z ocecia short, or stunted ; primary cells centric, 
fully exposed, but the surrounding cells which are wide apart, either 
wholly immersed or only partially exposed ; orifice circular, peristome 
thick, occasionally raised. Ocecia an inflated cell (9 b.) or an inflation 
of the Zoarium involving two or three cells (9 a). 
Locality: Cambridge, Greensand. 
12. — Diastopora confluens Eeuss. 
= Berenicea conjiuens, Novak, Beit. z. Kennt. Bryoz. der. Bohm. 
Kreid., p. 99, Part IV., figs. 19-22. 
(Novak gives several synonyms.) 
There are a few specimens of Diastopora in the collection that may 
be referred to this species as described by Novak, only that the cells 
are not altogether of the same shape as those figured by the author. 
All the cells are contiguous (confluent) and beautifully punctured. 
In section no ioter-spaces are apparent. It appears to be allied to 
Novak's species if not identical. Colonies circular — proliferous. 
Locality: Cambridge, Greensand. 
