Hardwicke's science-gossip : an illustrated medium of interchange and gossip for students and lovers of nature . -ia !iygro»ietricii, Fig. 54.—Moutli of Theca, showing peristome. antheridia; the former are filiform structures, orabortive leaves, the antheridia are on short the antheridium beneath a higher power(Fig. 50). It is seen to be a stalked sac, composed ofa layer of chlorophyll, bearing cells when young, butthey assume a reddish tint before bursting. Theyare filled with very minute antherozoids. On anotherstem, but taller than the last, will be found thearchegonia (Fig
Hardwicke's science-gossip : an illustrated medium of interchange and gossip for students and lovers of nature . -ia !iygro»ietricii, Fig. 54.—Moutli of Theca, showing peristome. antheridia; the former are filiform structures, orabortive leaves, the antheridia are on short the antheridium beneath a higher power(Fig. 50). It is seen to be a stalked sac, composed ofa layer of chlorophyll, bearing cells when young, butthey assume a reddish tint before bursting. Theyare filled with very minute antherozoids. On anotherstem, but taller than the last, will be found thearchegonia (Fig. 51). Make a section by holding thestem betwixt the thumb and finger, and gentlypushing the razor from you, then float out the sections in a bowl of water, select a few, carefully spreadingthem out with a needle on the slide, then search forthe atrhegonia. It consists of two portions, thelower ovate (Fig. 51, a), and the upper, or neck, ofarchegonium (Fig. 51, l>). The archegonium isruptured by the fertilised oosphere, often in such away that, while the lower part remains as a sheath,the neck is elevated as a cap now known as
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Keywords: ., bookcentury1800, booksubjectnaturalhistory, booksubjectscience
