ISSN:0368-2935    

DOI:10.1111/j.1096-3642.1898.tb01734.x

出版商:Blackwell Publishing Ltd    

年代:1898

数据来源: WILEY

ISSN:0368-2935    

DOI:10.1111/j.1096-3642.1898.tb01735.x

出版商:Blackwell Publishing Ltd    

年代:1898

数据来源: WILEY

ISSN:0368-2935    

DOI:10.1111/j.1096-3642.1898.tb01736.x

出版商:Blackwell Publishing Ltd    

年代:1898

数据来源: WILEY

ISSN:0368-2935    

DOI:10.1111/j.1096-3642.1898.tb01737.x

出版商:Blackwell Publishing Ltd    

年代:1898

数据来源: WILEY

ISSN:0368-2935    

DOI:10.1111/j.1096-3642.1898.tb01738.x

出版商:Blackwell Publishing Ltd    

年代:1898

数据来源: WILEY

ISSN:0368-2935    

DOI:10.1111/j.1096-3642.1898.tb01739.x

出版商:Blackwell Publishing Ltd    

年代:1898

数据来源: WILEY

摘要:

Summary.The following is a recapitulation of the characteristics in the possession of which the Actiniarian generaCorynactis, Rhodactis, andRicordeaexhibit decided Madreporarian affinities.Corynactis.—The occasional retention of a thin connecting cœnosarc in asexual reproduction; tentacles with a conical stem and a globular head; no gonidial grooves; mesenterial filaments simple, the Drüsenstreif only being developed; large oval nematocysts; mesoglœa practically homogeneous; endodermal musculature and sphincter weak, the mesoglœal surface supporting it being only sinuous or slightly folded; tentacles and mesenteries tetramerous.Rhodactisand Ricordea.—Retention of a multi‐oral disc; sharp division between the peristome and stomodæum; stomodæal wall regularly and deeply ridged; no gonidial grooves; mesenterial filaments simple; large nematocysts; weak musculature throughout.Corallimorphusshould also be mentioned as presenting many coral relationships—e.g.knobbed tentacles, no gonidial grooves, weak musculature, no sphincter muscle, large nematocysts; indeed all the members of Carlgren's Protantbeæ reveal suggestive conditions.Odd instances of the above characters may be present in other anemones, but, so far as yet known, no other Actiniæ exhibit such a combination of affinities. On the other hand, coral polyps are not alike in the possession of all of them. All that can be claimed is that thetout ensembleis more decidedly Madreporarian than Actiniarian. Morphologically both the Actiniaria and Madreporaria present such diverse features amongst themselves that little importance can be attached to any isolated detail in a species, but where so many are associated in the same species or genus the relationship claimed becomes almost irresistible.It is significant that the suggestion which Gosse (ante, p. 641) made, from external characters alone, of the close resemblance ofCorynactisto the coralCaryophylliashould be supported in every important detail by anatomical study.In the present state of our knowledge of the morphology of the Madreporarian polyp, it cannot be asserted to which actual coral families the three genera are most nearly related. They differ amongst themselves in fundamental respects, and the allies ofCorynactis, at any rate, must be far removed from those of the other two.Whether the forms specially studied are to be regarded as representatives of more ancestral anemones from which the skeleton‐producing polyps may have taken their origin, or as coral polyps belonging to different families which have for some reason lost the power of secreting a skeleton, must, for the present, also be left

ISSN:0368-2935    

DOI:10.1111/j.1096-3642.1898.tb01740.x

出版商:Blackwell Publishing Ltd    

年代:1898

数据来源: WILEY

ISSN:0368-2935    

DOI:10.1111/j.1096-3642.1898.tb01741.x

出版商:Blackwell Publishing Ltd    

年代:1898

数据来源: WILEY

ISSN:0368-2935    

DOI:10.1111/j.1096-3642.1898.tb03426.x

出版商:Blackwell Publishing Ltd    

年代:1898

数据来源: WILEY