CORALS FROM BRITISH DEVONIAN BEDS. 503 
As a specific name, Z. mudstonensis would perhaps not be open to 
the usual objections to a local appellation, inasmuch as it would 
serve to recall its horizon in a well-known coast-section. 
AwpLexus ToRTUosuS, Phillips, (Plate XXIII. fig. 3.) i 
My object in introducing this figure of a described species here is 
twofold: first, for the purpose of comparison with corals herein 
referred to Zaphrentis ; and secondly because it shows distinctly the 
quite marginal siphunculoid fossula, and that the septa are of one 
order only. The figures in the ‘ British Fossil Corals’ (Edwards 
and Haime) give no indication of the fossula. The septa number 
62, and are very short. Those on the left of the figure above are 
drawn too long, having been confounded with some radiating crys- 
tallization. 
Loc. Quarry near Wolfsgrove Farm, Bishopsteignton, in Middle 
Devonian limestone. 
CYATHOPHYLLUM ? BILATERALE, sp.nov. (Plate XXIII. figs. 4a, 46, 
4c, & 5.) 
Figures 4a and 46 are views of two transverse sections of an 
individual coral of unknown length, and measuring 27 inches in 
diameter. ‘Traces of the epitheca still remain, but it is clear that 
the surface is, on the whole, somewhat abraded. 112 septa ot two 
orders, the primaries stopping a little short of the centre, the 
secondaries from two thirds to three fourths as long. The bilamel- 
late character of the septa is very distinct. There is a large septal 
gap or fossula, filled with vesicular tissue, against the sides of which 
the principal septa abut, and partially affect a pinnate arrangement. 
The endotheca is very abundant; in the intermediate zone these 
structures unite the septa as ordinary vesicular dissepiments, and 
outwardly become confused with a multitude of plates which branch 
from and often return into the same septum, causing a generally 
vesicular condition, through which, nevertheless, the septa are never 
completely lost sight of. 
Obs. The specimen in question is an extreme type of a great 
number that occur in South Devon. It was found by a lapidary of 
Paignton, to whom I had mentioned the locality, and before I had 
an opportunity of a veto, met with the usual fate of being cut into 
a number of transverse slices, two of which are in the British 
Museum. They at least show that the fossula is a continuous 
feature. If it be simply a variety of Cyathophyllum damnomense, 
Lonsd. sp., I can only say that I have never before observed 
indications of bilateral symmetry in that species; the most perfect 
calice of C. damnomense that has come under my notice is one I 
brought from the Hifel, and it shows nothing of the sort. It is 
further, in my opinion, equally or more entitled to a place in Cyst 
phyllumw (1 which genus Lonsdale originally placed it) than in 
Cyathophyllum; and in this respect I am quite in harmony with 
the views held by Mr. Etheridge, junior. I also believe the Hifel 
specimen to be distinct from the present coral. 
