On Ceramopora megastoma and Fistulipora minor. 427 
Its nearest ally is 7. muricatus, a Mediterranean species ; 
but the present species differs in having a much shorter spire, 
with swoilen whorls, in the sculpture being smooth instead of 
prickly, the longitudinal strie finer and more numerous, the 
mouth wider and the throat smooth, and in the canal being 
much shorter and more open. 
Black Sea, 45 and 50 fms. Several specimens. 
The Black Sea is zoologically an offset of the Mediterra- 
nean, the latter and the Sea of Marmara being the interme- 
diate links in the chain which connects the Black Sea with 
the North Atlantic. I have endeavoured to show, in the 
‘Reports of the British Association for the Advancement of 
Science,’ that the Mollusca of the Mediterranean scarcely, if 
at all, differ from those of the North Atlantic. 
XLVI.—On the Identity of Ceramopora (Berenicea) mega- 
stoma, M‘ Coy, with Fistulipora minor, M‘Coy. By JoHN 
Youne, F.G.8. 
To the Editors of the Annals and Magazine of 
Natural Mstory. 
GENTLEMEN, 
In vol. xviii. (4th series) of the ‘ Annals,’ for 1876, there 
is a paper by Dr. Gustav Lindstrém, “ On the Affinities of 
the Anthozoa Tabulata,” in which, at pp. 5-9, he calls atten- 
tion to certain Silurian fossils that have been referred to the 
Tabulata, but which he says are in reality Bryozoa. As 
evidence of what he asserts, he refers to the common Silurian 
Monticulipora petropolitana, Pand., which, he says, begins 
life “as a Bryozoan, as a Dviscoporella, as what Hall has 
termed Ceramopora imbricata,” and he then goes on to 
describe it briefly from its earliest stages of growth until it 
arrives at the stage where it becomes a Monticulipora. 
Prof. H. Alleyne Nicholson, in his ‘Tabulate Corals,’ 
pp- 285-288, questions the correctness of Dr. Lindstrém’s 
statements, and says ‘‘ there are very strong grounds for re- 
garding Ceramopora as an independent organism, quite dis- 
tinct from all the forms of Monticulipora.” 
It may therefore interest some of the readers of the 
‘ Annals’ to learn that 1 have discovered specimens of ano- 
ther Bryozoan, or Polyzoan as I prefer to term it, in the 
Carboniferous-limestone strata of Western Scotland, that is 
closely allied to the Silurian Ceramopora, and which I have 
been enabled to follow clearly in all its various stages of growth 
