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Show 66 DR. J. S. BOWERBANK ON SILICEO-FIBROUS SPONGES. [Jm. 28, 23. MELAMPUS FASCIATUS, Desh. From the same islands as the preceding. 24. MELAMPUS CAFFER, Kiist. From Mahe. 25. MELAMPUS BRIDGESII, Carp. From Mahe. Under damp stones, close to the sea; extremely local, I only found it at one spot. 26. PLECOTREMA, n. sp. ? From Mahe. Under the stones of aii old jetty at Port Victoria; rare. 27. NERITINA GAGATES, Re'cl. From Praslin. In a very small rapid stream, close to where one crosses to go to Curieuse; very local. 28. MELANIA (MELANOIDES) TUBERCULATA, Mull. From Mahe, Praslin, and Silhouette. 29. PYRAZUS PALUSTRIS, Linn. From a creek at Mahe, near Port Victoria. 30. PALUDOMUS AJANENSIS, Mori. From a rapid stream, rather high up, at Mahe'; rarely collected. 31. PALUDOMUS, n. sp.? From Silhouette. Very rare; in a small stream, very high up. 3. A Monograph of the Siliceo-fibrous Sponges. By J. S. B O W E R B A N K , L L . D V F.R.S., F.Z.S., &c-Part I. (Plates III., IV., V., & VI.) In my observations on Dr. Gray's " Notes on the Arrangement of Sponges," published in the 'Proceedings' of this Society for 1868 (pp. 124 & 125), I have stated my objection to his arrangement of the siliceo-fibrous sponges, several species of which he has named and described in the volumes of the * Proceedings.' His descriptions are very brief, and are mainly dependent on the characters of external form and the peculiarities of their surface; but although describing them as sponges, he appears to be still in a state of uncertainty regarding their real nature. In his descriptions of his genera MacAndrewia and Myliusia (Proc. Zool. Soc. 1859, p. 437), throughout the whole of the paper, he expresses doubts' of their spongeous nature, and inclines to the belief, in p. 440, that they, with Dactylocalyx, might "all prove to be a peculiar family o'f |
