On Ceramopora megastoma and Fistulipora minor. 427 Its nearest ally is T. muricatus, a Mediterranean species; but the present species differs in having a much shorter spire, with swollen whorls, in the sculpture being smooth instead of prickly, the longitudinal striee 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 ' Keports 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 Young, F.G.S. To the Editors of the Annals and Magazine of Natural History. Gentlemen, In vol. xviii. (4th series) of the ( Annals,' for 1876, there is a paper by Dr. Gustav Lindstrom, " 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 Discoporella, 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. Lindstrom'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. 11 It may therefore interest some of the readers of the ' Annals ' to learn that I 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
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