. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. the resulting cavities, zoospores are to be (bund, which, though they altogether resemble in structure those of the other olive-coloured Algas, are about three times as large. The supposed antheridia of Cutleria communicate to the tufts of which they form a part, their characteristic orange colour. The organs themselves are elongated, sausage-shaped vesicles: they contain a greyish, granular matter, in which, as the organ becomes ripe, indications may be observed of a division into several concentric layers ; the more in
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. the resulting cavities, zoospores are to be (bund, which, though they altogether resemble in structure those of the other olive-coloured Algas, are about three times as large. The supposed antheridia of Cutleria communicate to the tufts of which they form a part, their characteristic orange colour. The organs themselves are elongated, sausage-shaped vesicles: they contain a greyish, granular matter, in which, as the organ becomes ripe, indications may be observed of a division into several concentric layers ; the more internal of these layers being distinguished from those next the surface by the greater intensity of the orange colour which they present. After Fig. 133. a, a portion of one of the tufts, or sori, of Cutleria, showing the mode of attachment of the filaments which support the sporangia to the surface of the frond; *, a ripe sporangium. Two others, half ripe, are also seen. Each is divided into eight compartments, in each of which is formed a zoospore,—200 diam.; b, zoospores ; c, the same in various stages of germination; the earliest stage to the right, 300 diam. side of which, tufts (son'), consisting of the reproductive organs, intermixed with hair- iike bodies, are scattered at irregular intervals. The sporangia, and so-called antheridia, are borne by different individuals, but their po- sitions and arrangements on the frond are identical. The former consist of oblong or club-shaped bodies, which are supported by hyaline pedicles, set into their inferior extre- mities. The cavity of each sporangium is divided by three transverse partitions into four cavities, each of which is again bisected by a longitudinal median septum. In each of Fig. Contents of ewtheridium of the smue, 400 diam. Each antherozoid is an oval hyaline corpuscle, which moves in the direction of its long axis. It exhibits towards its posterior extremity a coloured granule, from which springs a pair
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Keywords: ., bo, booksubjectanatomy, booksubjectphysiology, booksubjectzoology
