The royal natural history . acles. These dead creatures act as baits, and attract other victims withinthe influence of the same stream. These also are drawn into the mouth. Onaccount of these peculiar structures, the Chilostomata have been called the birds-head corallines. Equally interesting again are the vibracula, long thread-likestructures, attached by short stalks, which keep up a constant whip-like function is not clear; but perhaps they may be specialised tactile organs, ormay help to drive the minute prey within reach of the nutritive , we have the ovicel
The royal natural history . acles. These dead creatures act as baits, and attract other victims withinthe influence of the same stream. These also are drawn into the mouth. Onaccount of these peculiar structures, the Chilostomata have been called the birds-head corallines. Equally interesting again are the vibracula, long thread-likestructures, attached by short stalks, which keep up a constant whip-like function is not clear; but perhaps they may be specialised tactile organs, ormay help to drive the minute prey within reach of the nutritive , we have the ovicells, or egg-receptacles, which are found at the lower endsof the zooecia in the form of bells, helmets, or vesicles. It is uncertain whetherthese are independent modified individuals or merely appendages of the zooecia,the latter view being the more probable. Round-Mouthed Another suborder of the Gymnolaamata consists of the CyclostomataGroup. or round-mouthed Bryozoans. In the tube-like forms (Tubulipora), 424 Tulndipora, verrucosa. a. Part of a stock (magnified); b, A few cells (highly magnified); c, A stock (nat. size). which may be taken as typical of this suborder, the relation between the infoldingportion of each individual and the rigid cell differs from that in the Chilostomata;and the aperture of the cell is terminal and wide, passing into the soft anterior end without narrowing. Tubulipora, is one ofthe numerous round-mouthed forms, thestocks of which form cup-shaped incrusta-tions, the individuals radiating outwards asseen in the magnified figure (a). In Fig. b,several cells are still more highly c shows the natural size of the moss-animals seem to be excep-tionally rich in methods of is, firstly, the sexual reproductionabove mentioned; secondly, the multiplica-tion of individuals by budding and stockformation; and, thirdly, a peculiar repro-duction, found in fresh-water forms, inadaptation to external condit
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Keywords: ., bookcentury1800, booksubjectnaturalhistory, booksubjectzoology
