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more acute angle towards tire apex than at the base. The general appear- 
ance of the coenoecium is that of a feather, and its development proceeds on 
much the same plan. The anterior surface of the different hranches is covered 
with a double row of alternating cells, separated by a mesial keel much more 
pronounced on the principal branch than on tlie others ; and there are gene- 
rally three cells on the principal branch between every two points of insertion 
for the lateral branches. The posterior surface of the branches is striated, 
and irregularly covered with small tubercles, well marked in the Australian 
species under my notice. 
Dimensions. — The total length is seven centimetres ; thickness of the 
principal branch, about one millimetre at the base ; total length, about three 
centimetres. 
Horizon and Localities. — This species was discovered by Mr. 0. B. 
Newenham, in the middle beds of the Carboniferous Limestone near Cork, 
Ireland, and was first described by Professor McCoy. Mr. W. B. Clarke 
found it in a rather ferruginous brownish limestone at Burragood, on the 
Paterson Biver. 
Genus — BENDBICOPOBA, L. G. de Konincic. 
The coenoecium is formed of a central vertical axis, to which are joined, 
at irregular distances, lateral branches nearly as important as the axis itself ; 
all these branches give rise to a large number of branchlets, very obliquely 
inserted, close together and nearly parallel ; these branchlets are united at 
regular distances by crossbars, giving rise to sub-rectangular fenestrules, 
exactly like those in Fenestella. The external surface of the branches and 
branchlets hears a triple row of cells, and is not keeled. 
Relations and Differences. — It is easily seen that this species bears 
a great resemblance to the genus Dtylopora of Scouler, the characteristics of 
which have been given by McCoy. It differs from it essentially by the great 
number of its principal lateral branches, of which there is not a trace in 
Dtylopora. At present I know of only a single species of this genus ; it 
comes from the Carhoniferous Limestone, and the Bev. W. B. Clarke has 
dedicated it to one of his friends, Mr. Hardy, of Yass, to whom he was indebted 
for a number of fossils from the neighbourhood of that town. 
