. Catalogue of the madreporarian corals in the British Museum (Natural History). Scleractinia. Fig. 1.—Diagrams to elucidate the underlying septal formula A of Goniopont, and B of I'mites, to show how the latter may be derived from the former. Two of the primaries are seen to be directives, while the remaining four fuse with four of the secondaries. The tertiaries fuse in pairs with the secondaries between them. The larger pali arise at the points of fusion of the septa, but seem to be associated more with the secondaries than with the primaries, for it is to be observed that while the directi
. Catalogue of the madreporarian corals in the British Museum (Natural History). Scleractinia. Fig. 1.—Diagrams to elucidate the underlying septal formula A of Goniopont, and B of I'mites, to show how the latter may be derived from the former. Two of the primaries are seen to be directives, while the remaining four fuse with four of the secondaries. The tertiaries fuse in pairs with the secondaries between them. The larger pali arise at the points of fusion of the septa, but seem to be associated more with the secondaries than with the primaries, for it is to be observed that while the directive primaries usually have no pali, the pair of secondaries which do not fuse with primaries have small pali. Whatever be the explanation, it is a fact which has been frequently noticed in the genus, that the pali seem to be usually associated with the secondaries. It is, however, doubtful whether this is invariably the case. For when the secondaries are feebly developed and the primaries are prominent, the teeth of the latter certainly bend up and supply the place of pali. To diagram A I have added diagram B, in which the tertiaries are represented as disappearing. Their final disappearance changes the formula typical of Goniopora into that of Porites. When I described and figured this latter formula,* I despaired of finding any formula Journ. Linn, Soc, xxvii. (1900) 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 British Museum (Natural History). Dept. of Zoology; Brook, G. L. (George Leslie), 1910-; Bernard, Henry Meyners; Matthai, G. London, Printed by order of the Trustees of the British Museum
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