502 A, CHAMPERNOWNE ON SOME ZAPHRENTOID 
judicial to their correct generic diagnosis. With regard to Phillips’s 
species let me quote Messrs. M.-Edwards and Haime*. They say :-— 
«« Professor M°Coy justly remarks that the specimens described by Mr. 
Phillips were young individuals, and mentions a gigantic specimen, 
the diameter of which was 1 inch 9 lines.” Hence it is clear that they 
rival in size the corals now before us. I may add that a portion of 
A. tortuosus (now on the table) considerably exceeds the size given 
by Mr. M‘Coy; but I notice this difference between them and the 
present subject: all the septa are much more rudimentary, and 
they appear sunk in the substance of the epitheca (or theca?), from 
which they differ by having a more opaque, and consequently 
denser, tissue. They consist of one order only, and are about 62 in 
number. A fossula is rarely to be seen, and when present it is quite 
marginal and siphunculoid. 
After consulting several works and the British Museum collec- 
tions, I can find no species at all approaching these sections except 
Z. gigantea, Lesueur, from the Corniferous Limestone of North Ame- 
ricay. With this, however, if we make allowance for the short 
pieces available from the Devonshire rocks, they agree in essential 
particulars. Rominger gives 150-160 septa for the American coral, 
whilst the highest number in my Pl. XXII. is 124. If we pro- 
visionally adopt the name Z. subgigantea, the qualifying prefix can 
be dropped if a closer approximation should be proved. 
Horizon and localities—In Middle Devonian limestone; figs. 2 
and 3 (Brit. Mus.), Woolborough quarry, near Newton Abbot; fig. 4, 
Lummaton quarry, near Torquay; fig. 5, in black-marble quarry 
near Wolfsgrove farm, Bishopsteignton. 
ZAPHRENTIS MUDSTONENSIS, sp. nov. (Plate XXIII. fig. 2.) 
Calice oval, measuring 13 inch by ? inch, moderately deep. 
Principal septa 31, strong and straight, extending to the bottom of 
the calice, where they unite on the margin of a smooth, well-defined, 
central portion of the uppermost tabula. The merest rudiments of 
a secondary series can be observed close to the periphery. Septal 
fossula well defined, situated on the longer side, extending to the 
margin of the central area, and containing a septum which is shorter 
than the remainder, but included in the number stated. 
Obs. This coral cannot be confounded with any British Devonian 
species hitherto described. It is to be regretted that the figure does 
not do it justice, the original being in a finer state of preservation 
than one might suppose from the figuret. Ihave observed portions 
of one or two more individuals that I took to be identical with this. 
Horizon and Locality. The horizon is lower in the series than 
that of any other species described in this communication, being the 
light-grey mudstones which form the hollow of Mudstone Bay, 
beneath the limestone mass of Berry Head and Sharkham Point. 
TG. Dea 
+ Rominger, J. ¢. p. 46, pl. lii. 
+ This is from no fault of the artist, as a small coral (previously drawn) 
had to be erased, after which the stone was not susceptible of fine work. 
