MIDDLE AND WESTERN ENGLAND AND SOUTH WALES. 373 
CyatHocenia costata, Duncan, loc. cit. p. 29, pl. v. figs. 10, 11. 
Of this well-marked. species I have never met with a specimen, 
and I insert it here on account of its undoubted specific distinctness. 
Genus Isastrma, Edw. & Haime. 
Isastr#s Gimpeti, Laube, loc. cit. p. 263, Taf. vii. fig. 2. 
Impressions of a few calices which, from their size as well as from 
their details of structure, are probably referable to the above species, 
were found by me in the Sutton Stone. With the exception of 
these, I have failed to discover any indications of an Isastrwa in that 
deposit. 
TsasTRHA SINEMURIENSIS, E. de From. in Martin, Paléont. Stratigr. 
Infra-Lias, p. 93, pl. vil. figs. 16, 17; Duncan, loc. cit. 
p. 30, pl. vu. figs. 1-9. 
On referring to the original figure of this species it will be ob- 
served that it has one calice which is much in excess of the others 
in size. No such discrepancies can be seen in the calices of any of 
the specimens from Brocastle; and, moreover, they are all, gene- 
rally speaking, smaller than those shown in the figure alluded to, 
and approximate in this respect those of [sastrewa Giimbelit of Laube, 
a species to which the present also bears considerable resemblance 
in the shape and size of the corallum. 
IsastRmA G@LoBosa, Duncan, loc. cit. p. 31, pl. vii. figs. 17, 18. 
In the small size and globular and subpedunculate form, as well 
as In the thickness of its septa in relation to the interseptal loculi, 
this species bears a decidedly St. Cassian aspect. It appears to be 
a less abundant species than the last, and has been met with only 
in the Brocastle conglomerate, from which I obtained a very charac- 
teristic example some years since. 
Genus Szprastrma, d’Orbigny. 
SEPTASTRHA EXCAVATA, From. ? 
In the conglomerate overlying the Sutton Stone and associated 
with Gryphites and Ammonites, the latter undeterminable, are the 
remains of compound corals, which are most lkely Sepiastrac. 
-One specimen only was seen by me very near to the caves, whieh I 
believe is referable to this species. A greater number were observed 
not far from Dunraven Point. These may have been Septastrew 
or one or other of the known species of /sastrea which occur in the 
Amm.-angulatus-zone of the Lower Lias. I have also some fragments, 
apparently of this coral, taken from the Brocastle conglomerate. 
