MOORE — ON NEW BRACHIOPODA, ETC. 99 
Discinoj orhicidaris. Moore. PI. ii., figs. 16 — 18. 
Shell small, orbicular, tapering to an elevated apex, giving tlie 
shell a somewhat conical form ; margin smooth and rounded. Outer 
surface of valve smooth, with numerous concentric lines of growth ; 
the inner smooth and very concave. 
Obs. — This shell does not appear to have attained a larger size 
than is indicated in pi. ii., fig. 18. It is from the fish-bed and the 
clays associated there\vith in the Upper Lias of Ilminster. By its 
form it is readily distinguished from any other species. 
Discina Toiumhendu. Forbes. 
A very fine specimen of this shell, belonging to the Museum of 
Economic Geology, was figured by Mr. Davidson in the volume of 
the Palaeontographical Society for 1850. Its locality was then un- 
certain, though Mr. Davidson was informed it was from the Oxford 
Clay. Sabsequently it was suspected to be from one of the lower 
beds of the Lias. Having discovered the species in the " Avicula 
contorta zone" at the base of the Lias, near Taunton, I am enabled to 
settle its position. M. Edward Suess, of Vienna, has informed me 
that he has also obtained the shell in the Rhoetie beds of Austria, 
in which the "Avicula contorta zone" is included. 
Discina Humphreijsiana. Sowerby. 
This species has hitherto been found only in the Kimmeridge Clay. 
It may be desirable to record its presence in the Coral Bag of Lyne- 
ham, where it is abundant. 
RhyncTwnella spinosa. Schlotheim. 
In the Cotteswold and other lower oolites this shell has been sup- 
posed to indicate a particular zone. Although it is therein especially 
abundant, it is by no means confined to it. I have obtained the 
species from the Fuller's Earth, near Bath, and also in the Bradford 
Clay. Some very dwarfed or young forms of it are to be found in the 
upper beds of the Inferior Oolite of Dundry. 
Terebratula carinata. Lamarck. 
This shell has hitherto been found only in the Inferior Oolite. 
Some specimens smaller than the type-form are to be found in the 
coralline bed of Hampton Clifis, which I am unable to distinguish 
from this species. 
(To be Co?itimced.) 
