. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 134 On the Interrelationships of the Madreporidge. Madvepovin^. The chief objection to this rests in the specialized character of the laminate radial structures ot Astrceopora, which ought, perhaps, to separate tliat genus from Madrepora and Turhinaria. In the meantime, how- ever they can be usefully united in the manner suggested. I therefore suggest the following arrangement of the family :— Family Madreporidse. SuTDfamiHeS : I. MADREPOBlNiE. II. MONXIPOHINiE. \ Genera: Madr
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 134 On the Interrelationships of the Madreporidge. Madvepovin^. The chief objection to this rests in the specialized character of the laminate radial structures ot Astrceopora, which ought, perhaps, to separate tliat genus from Madrepora and Turhinaria. In the meantime, how- ever they can be usefully united in the manner suggested. I therefore suggest the following arrangement of the family :— Family Madreporidse. SuTDfamiHeS : I. MADREPOBlNiE. II. MONXIPOHINiE. \ Genera: Madrepora. Turhinaria. Astraopora. Montipora. Anacropora. A serious objection may be raised to this description of the phylogeny of the Madreporidge, viz. that it is apparently based exclusively upon study of the five genera dealt with. It is true that such a limitation of one's survey makes all Generalizations hazardous. I am, however, encouraged to state the conclusions I have arrived at with regard to these genera even at this early stage because they are not based solely upon study of the five genera concerned. Most of the other Madreporarian genera—at least, the better known of them—have been studied and compared again and again for the express purpose of arriving at some clear insight into the different lines along which the stony corals have been diffe- rentiated. I am aware that this does not appear from anything said in this paper. I have, however, here pur- ? posely abstained from making any definite morpiiological statement about any genus which I have not studied syste- matically. The survey of a few specimens of any particular genus may give reliable hints for guidance towards a better understanding of the genera which are at the time the object of close study, but cannot be exact enough to admit of definite assertion. It is, indeed, quite possible that when all the available specimens of the genus Porites have been under review, the purposely very limited refere
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