LOWER LIAS: BKOCASTLE. 113 
The following species have been recorded from the Southern- 
down Series : 
Ammonites angulatus. 
Belemnites acutus. 
Cerithium nodulosum. 
Littorina(P) clathrata. 
Cardinia. 
Gryphaea arcuata. 
Lima duplicata. 
Lima gigantea. 
tuberculata. 
Ostrea liassica. 
multicostata (arietie). 
Pecten suttonensis. 
Plicatula intusstriata. 
Echini spines; 
At Brocastle again, there is a rich Coral fauna, containing in 
fact more species than have been found in the Sutton Stone, 
although a certain number are common to the two deposits. 
From this locality Moore obtained a very rich collection of 
fossils, but, as he remark?, most of these proved to be new, 
and therefore they afford but little evidence for correlating the 
beds with other zones in this country. However, the presence 
of Gryphcea arcuata, Lima gigantea, Ostrea liassica, together with 
several species of Cardinia, recorded by Moore, suggest an early 
stage of the Lower Lias, and agree generally with his grouping 
of the beds in the zone of Ammonites angulatus, a position also 
assigned to them on the evidence of the Corals.* Mr. Tomes has 
expressed the opinion that the Brocastle bed has been to some 
extent re-assorted, and this is not improbable :f undoubted evidence 
of the reconstruction of beds is met with in the Lower Lias of the- 
Radstock district. Among the Corals (which have been worked 
out mainly by Prof. Duncan) are species of Astroccenia (Styla- 
strcea), Isastrcea, Montlivaltia, Thecosmilia, &c. 
The old quarry of Brocastle. from which Moore obtained his^ 
Liassic fossils and to which reference has been made by several 
geologists, is situated on the road from Corntown to Cowbridge, 
east of the buildings known as Longland, on the north side of the 
road, and a short distance (about | of a mile) west of Brocastle. J 
The quarry is practically disused, and the conglomeratic beds of 
Lias are mostly obscured. It is however possible to trace these 
beds abutting irregularly against the Carboniferous Limestone, as 
represented by Moore. The older rock is a dark blue crystalline 
and compact limestone, containing Spirifers and Encrinites. The 
Lias beds comprise greyish-brown granular limestones, and con- 
glomeratic layers having a matrix of pale and compact limestone. 
Cherty masses here and there occur in the weathered soil on top 
of the Carboniferous Limestone. 
West of Longland, about 8 feet of coarse pale grey granular 
and brecciated limestones have been opened up by the roadside, 
and at the lime-kiln to the south, beds of conglomeratic Lias abut 
against the Carboniferous Limestone. The Lias near Cowbridge 
was said by Buckland to be oolitic, but I have not obtained any 
* Moore, Quart. Journ. Geol. Soc., vol. xxiii. p. 521; Duncan, Ibid., p. 17. See 
al?o Eev. H. H. Winwood, Proc. Bath Nat. Hist. Club, vol. vi. p. 218. 
f Quart. Journ. Geol. Soc., vol. xl. p. 357. 
J Moore, Quart. Journ. Geol. Soc., vol. xxiii. p. 521. 
Murchison, Trans. Geol. Soc., Ser. 2, vol. ii. p. 362. 
E 70859. H 
