17 
The polished surface on the other side proves that the stone is 
almost entirely formed by this fossil : and the internal view of the 
tubes which is thus obtained shews, that the tubipore was formed of 
hollow tubes, which are now filled with clear spathose matter ; and 
that there is no appearance of that internal structure which is ob- 
servable, either in the tubipora musica, or in madrepores. In some 
parts, may be seen, sections of the transverse pipes, which preserve the 
communication between the several perpendicular tubes. 
The appearance of this tubipore differs considerably in different spe- 
cimens. In a beautiful white specimen, evidently of the same species, 
from the Marquis of Donegal s Collection, the general appearance dif- 
fers much from the preceding fossil, Plate II. Fig. 1, partly from the 
elegant plumose forms, which the ramifications have assumed; and 
partly from the whiteness of the earth, and the pureness of the spathose 
matter, with which it has become impregnated ; it being a beautiful 
white marble. The characteristic, minute, transverse, connecting 
branches are very numerous and conspicuous, and plainly evince the 
species to which it belongs. Dr. Woodward describes a specimen 
which appears to belong to this species of tubipore. His description 
of it is, “ a fasciculus of several pieces of a grey coral, lying generally 
parallel, and held together by means of several small branches passing 
from one to another, and uniting where they meet. The whole somewhat 
resembles the tubularia purpurea of Ferrante Imperati: and the stems 
of this are of the thickness that those of that commonly are. Some 
of them are tubular ; others solid. Found near Sedberg, in York- 
shire."’* 
* Catalogue of Fossils, Vol. I. Page 130, E. 4. 
VOL. II. 
D 
