FRUCTIFICATION OF SEA-WEEDS. 35 



liform filaments, much magnified, wliicli compose the 

 nemathecium. 



The only other kind of fructification of which I shall 

 give a figure, is that called antherklia. These are not un- 

 common. They are found in so great abundance on I'olij- 

 sipJwnia fastigiata at times, as to give a yellow colour to 

 the plant quite observable by the naked eye. At letter 

 /, fig. 1 represents the tip of a filament of Poli/siphonia 

 fihrata with antheridia among the spiral fibres. 



'' The seed," says Professor Harvey in his Manual, " ap- 

 pears to consist of a single cellule or bag of membrane, 

 filled with a very dense and dark-coloured granular or semi- 

 fluid mass, called the endochrome. This seed, or germina- 

 tion, produces a perfect plant, resembling that from which 

 it springs. Its growth may be watched from the commence- 

 ment, when what we may call the ovule, or germ of the 

 future seed, begins to swell. But nothing whatever has 

 been ascertained that throws the smallest light on the process 

 of fecundation." 



Lindley, in his ' Vegetable Kingdom,' says : " The 

 younger Agardh has expressed his deliberate opinion that 

 in the Eose Tangles (his Floridece), organs analogous to 

 sexes are present. ' I am very much incHned,' he says. 



