; 
of branches, are imbedded in the mountain limestone of 
_ Derbyshire, Yorkshire, &c. ; and a few species occur in the 
Coralline Oolite; their general configuration will be under- 
stood by the figure Lign. 70, fig. 3; but in this specimen 
the margins of the cells are worn off, Ae do not present the 
_ original iesply excavated form.* 
There is a remarkable specimen of this coral in the Bristol 
— Institution (of which a portion is now placed in the Museum 
of Practical Geology, in London), that was discovered by 
_ Mr. Samuel Stutchbury,t in a vein of hematitic iron ore. 
It is a large mass, in which the entire substance of the 
coral is transmuted into a metallic ore, forming one of the 
- most interesting natural electrotypes I have ever seen. In 
this instance, a block of Lithodendron must have lain in a 
_yein or fissure of the rock, and its animal membrane have 
resisted the action 0 the gaseous emanations, or mineral 
solutions, while the calcareous polypidom was dissolved, and 
the metallic matter deposited atom by atom, as in the case 
_ of pseudomorphous crystals. 
_ Gorconta.—Of the flexible anthozoan coral, which from 
the flabellated form of the polyparium is generally called 
_“ Venus’s fan,” and by naturalists Gorgonia, a few fossil 
species have been discovered and determined. From the 
friable arenaceous limestone beds of Maestricht, which abound 
in corals, fine specimens of a delicate species are occasionally 
procured. Wond. p. 320, fig. 5, shows the character of this 
fossil zoophyte. 
FOSSIL BRYOZOA. 265 
: 
; 
; 
5 Fossit Bryozoa. 
The second class of Polypifera, the Bryozoa or Polyzoa, 
are of a much higher order of organization than those which 
have engaged our attention. The body is not symmetrical, 
* Lithodendron fasciculatum, Pict. Atlas, pl. xxxviii. fig. 8. 
+ Now of Sydney, Australia. 
