The royal natural history . A sea-anemone, Actinia effceta(nat. size). He saw that the ciliated, 502 CCELENTERA TES. illustration, has, immediately round the mouth, several circles of delicate graspingtentacles, shaped like curly cabbage or endive leaves. Below these comes a circleof numerous thick arms altogether unlike the others, being rough-skinned, and ofa simple spindle shape, the body itself forming a thick disc. All the tentacles of. endive-anemone, Crambadis (somewhat less than nat. size). the sea-anemones are hollow, with a fine aperture at the tip, through which, whenthe animal cont
The royal natural history . A sea-anemone, Actinia effceta(nat. size). He saw that the ciliated, 502 CCELENTERA TES. illustration, has, immediately round the mouth, several circles of delicate graspingtentacles, shaped like curly cabbage or endive leaves. Below these comes a circleof numerous thick arms altogether unlike the others, being rough-skinned, and ofa simple spindle shape, the body itself forming a thick disc. All the tentacles of. endive-anemone, Crambadis (somewhat less than nat. size). the sea-anemones are hollow, with a fine aperture at the tip, through which, whenthe animal contracts, the water contained in the body-cavity can be expelled, butin the deep-sea forms these organs are very curiously modified. For instance, inthe genus Polysijjhonia, here illustrated, the tentacles are short and unsuited for catching and holding prey ;but the aperture at the tipis large, and through itflows in water containingorganic detritus which canbe used as food. The alliedSicyonis has sixty - fourwart-like tentacles withwide apertures standing ina double circle round themouth, and in Liponemathe body-wall is perforatedby several hundred aper-tures leading into thedigestive cavity and corre-sponding to the Ui__^S- Although most mein- short-tentacled anemone, Potysiphonia (nat. size). bers of the group arise as
Size: 2087px × 1198px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, booksubjectnaturalhistory, booksubjectzoology
