CARBONIFEROtrS CORALS AND BRACHIOPODS 117 
There are a little more than 40 septa. 
The vertical section shows close, much broken, tabulse 
in the central area which bend dowmward within the 
septal zone ; the outer zone is occupied by a few (four or 
five) ascending rows of vesicles. 
The locality is not indicated, but is probably the same 
as of the figured specimen. 
Clisiophyilum. 
This genus vies with Zaphrentis in its importance as a 
Carboniferous fossil group. The examples in the collection 
are, however, astonishingly few, when we consider how 
easily excellent specimens can be obtained in the Bristol 
district. I shall consequently defer an exhaustive examin- 
ation of the group until I come to deal with a very much 
greater mass of material. 
For the present, I include under Clisiophyilum the large 
number of new genera created by Thomson (partly in 
conjunction with Nicholson), and shall only briefly refer 
to such genera as sections. 
Clisiophyllids allied to Clisiophyilum urhinatum, McCoy,. 
PL 1, Fig. 6. 
To this group may be referred four specimens. 
The horizontal sections, not exceeding 2J cm. in 
diameter, have relatively large central areas (from J to J 
the total diameter). The central area is bisected by a 
strong meisal plate which extends almost completely 
across it ; on either side of this plate there are a small 
number (usually six or seven, but often more) of short, 
prominent, radiating lamellae, which traverse close, con- 
centric rows of narrow vesicles. 
Primary septa short, a little more than forty in number, 
with an inconspicuous secondary series which are very short 
