. The Cambridge natural history. Zoology. 258 COELENTERATA HYDROZOA vertical tube divided into sections by horizontal calcareous plates (Fig. 129, Tab). These plates are the "tabulae," and constitute the character upon which Millepora was formerly placed in the now discarded group of Tabulate corals. The coral skeleton is also perforated by a very fine reticulum of canals, by which the pore-tubes are brought into communica-. FiG. 128.—A portion of a dried colony of Millepora, showing the larger pores (gastro- pores) surrounded by cycles of smaller pores (daotylopores). At the edges t
. The Cambridge natural history. Zoology. 258 COELENTERATA HYDROZOA vertical tube divided into sections by horizontal calcareous plates (Fig. 129, Tab). These plates are the "tabulae," and constitute the character upon which Millepora was formerly placed in the now discarded group of Tabulate corals. The coral skeleton is also perforated by a very fine reticulum of canals, by which the pore-tubes are brought into communica-. FiG. 128.—A portion of a dried colony of Millepora, showing the larger pores (gastro- pores) surrounded by cycles of smaller pores (daotylopores). At the edges the cycles are not well defined. tion with one another. In the axis of the larger branches and in the centre of the larger plates a considerable quantity of the skeleton is of an irregular spongy character, caused by the disintegrating influence of a boring filamentous Alga.^ The discovery that Milhpora belongs to the Hydrozoa was made by Agassiz^ in 1859, but Moseley^ was the first' to give ' This organism is usually described as a fungus (Achlya), but it is probably a green Alga. See J. E. Duerden, Bull. Amer. Mus. Nat. Hist. xvi. 1902, p. 323. ^ Bibl. Dniv. de Geneve, Arch, des Sciences, v. 1859, p. 80. 2 Phil. Trans, oxlvii. 1876, p. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harmer, S. F. (Sidney Frederic), Sir, 1862- ed; Shipley, A. E. (Arthur Everett), Sir, 1861-1927. ed. [London, Macmillan and Co. , Limited; New York, The Macmillan Company
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