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297. AntherDzouIs s^\;n■llling about 

 the egg cell. — Thukf.t. 



432. From the series given 

 abo\e (Ectoearpus, Cutleria, 

 lioekweed) it is apparent 

 that the antherozoids in 

 JiDL-kweed are in the natnre 

 of reduced zoospores ; whilt^. 

 the egg cell also answers to 

 a zoospore, only in this case 

 the cell is of increased size, 

 and being from the tirst 

 devoid of cilia, is entirely 

 passive. 



RED ALGiE 



433. 'riie Red Alg;e (Fig. 21:18) are, with few excep- 

 tiiiiis, murine. 1 While many forms may be found in very 

 sliallow water, many are found in deep water Avhere, 

 owing to the feel)le light, no other alg;e can exist. In 



2(18. Red Alyai: A, Delesseria sinuosa: 

 B, the so-called Irish Moss; C, a 

 fresh-water sijecies, Batracho.y^rr- 

 mum cu;nihsce)h'i ; B, two fila- 

 ments of the last, showing the 

 cells. 



some of the smallest and simplest species the thallus con- 

 sists of loose branched hlaments (Fig. 298, D): in otliers, 

 as in the Irish Moss (Fig. 298, H), the flattened thallus is 

 divided into narrow segments ; while in many others, the 



1 Clf fresh-water species, Bati'acliospenuuiu, Fig. 2'J8, C, is very commoB 

 on stoues iu Ijroola. 



