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from the injuries which they have sustained, but little information can 
be acquired respecting them. The characters by which this would 
be determined are chiefly, the form of their ramifications, and the form 
and disposition of the small stellular pores with which they are beset. 
But the fracture of the branches, and the obliteration of the pores, 
are among the most frequent injuries which these bodies have sustained : 
hence the ascertaining of their species, a circumstance particularly 
desirable, can but seldom be accomplished. 
The specimen figured at Plate VIII. Fig. 9 , which is from Mr. 
Strangers Collection, and was obtained from France by that gentle- 
man, is a madrepore imbedded in a very hard chalk. The fragment is 
too small to allow any determination with respect to its species. 
The madrepore represented at Plate VIII. Fig. 6, is from the Col- 
lection of the same gentleman, and appears to have been obtained, 
with many other similar fragments, from Switzerland. The surface is 
pretty thickly beset with cavities, shallowly, but rather extensively, 
stellated. 
Of the millepores, at least from the few which I possess, or have 
had the opportunity of seeing, I suspect, that not many are found in a 
mineral state. 
The ramose millepore, from Wiltshire, Plate VIII. Fig. 3, is in a 
tolerable state of preservation; its pores are very distinctly seen by 
the aid of a slight magnifier, as at Fig. 11. It is imbedded in a very 
hard and close lime-stone of a brown colour. 
Of the genus Cellepora I am unable to speak decidedly. In the 
masses of calcareous stone of St. Peter’s Mount, at Maestricht, are 
some fossil substances which seem to belong to this genus, and a 
minute coralline substance resembling cellepora pumilosa is frequently 
seen on some of the fragments of encrinites, in the neighbourhood of 
Bath. 
The genus Isis, the generic characters of which are, the possessing 
a stony articulated stem, the joints longitudinally striated, connected 
