198 C. F. LASERON. 
and the presence of six instead of three of these in the length 
of a fenestrule. 
Genus PHYLLOPORA or PROTORETEPORA. 
(Pl. III, fig. 1.) 
Species indeterminate. 
I have only one specimen of this form, which does not. 
unfortunately show sufficient characters to enable it to be 
determined, but the colony is evidently cup-shaped with 
the celluliferous surface on the interior. The branches are 
moderately thick and very irregular, bending and uniting 
with each other to form the sometimes oval, but more often 
irregularly shaped fenestrules. Cross-bars are generally 
absent, and when present are not defined; in fact it is 
difficult tosay whether certain slightly thinner connecting 
processes are branches or cross-bars. 
The non-celluliferous surface is not striated but covered 
with innumerable small tubercles. Celluliferous surface 
not known, but in one portion of the specimen there is. 
evidence that the cells are rhomboidal in shape and about. 
three rows are present on each branch. 
Locality and Horizon:—Branxton (Upper Marine Series)- 
Remarks:—The very irregular method of growth and the 
tuberculated exterior is characteristic of this form, and it 
is apity that sufficient material is not available to satis- 
factorily place it. 
Explanation of Plates. 
Plate [. 
PROTORETEPORA MONTUOSA sp. nov. ‘The exterior of a cup- 
shaped colony, with a portion of the outer layer in the left hand 
top corner removed, showing the base of the celluliferous layer 
with its rhomboidal cells. Upper Marine Series, Branxton. “ 
Plate IT. 
P. MontTUOosA sp. nov. Fig. 1, Part of the same specimen as in 
Plate I, magnified 20 diameters, showing the exterior of the colony, 
