ALG VLS. 



II 



I 



i 



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\ , ,| ,,l l \ Ml 

 I . \ I \ ( ' 



drothanwion, < hou lr< siphon, i 

 i. \ \ Ciiampii ■ Cbmnj I ... « . a ■ 



urn. 



I. \ \ I. 1>. ! 



LXX1I l. i 



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I \ \ \ ' 



LXXV 1. P i 



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ition like i gh< r plants. Bj 

 acid and omU b is to say, tin 



and give off carbonic acid The quantity ■ a which I 



Lerable. M. Aim-'-, who has made numen 



■l in collecting a litre by agitating marine p] 

 two square yards of Burface. The same observi that the coloui 



tballus does uot interfere with this phenomi uon, a red or brown thallus 

 • if it we . / • ■ .17. 



M. I I'luiivt lias add< v to on 



; this alliance. The virus..)' himself and M. Decaisneare 

 , but it seems desirable to iter detail th 



upon the zoospores, or a irticles of the Algal a 



tion is made at p. 14, and which were once Bupposed I i . in 



n have now hem ascertained to bi n to the whole all 



substance of M. Thurel - is as follows : — 



The name ofZoospoRj □ to the reproductive I 



particular moment escape from tl a plant and d 



rounding liquid, where t ; th activity, aided by vibi 



.1 animalcules, but they differ in having the 

 perl • like thai 



The reproduction of Algols bj a much more common pi 



1. Instead of being .online.! to the 

 irs in the most completely organised tonus, such as Laminarias, which an 

 remarkable for their ( than tor the. turo. 



; ■ to be always produced by a kind ■ 



matter contained in the cells, which collects into m 

 at first, but which gradually assume the form peculiar to these prod 

 idly monsters are found among them. In Enteromorpha clathral 

 fairs l.\ their rostrum: in Bryopsis plumosa the; ther in 



facility with which such anion takes p] ig to show that thej 



tin : as is otl proved by the readiness with which I 



ammonia this is, however, true of them only while very 3 

 in commences thej have gained a very perceptible skin. 

 ! alua\ a takes place with boh 

 their pressing upon each other in too d a placi 



rupture o hen there is no packing. Th. 



with which a colourless mucilaginous fluid Becreted in the - 

 distends it. probably by endosmotic a. -tion. The : 

 able; M. Thuret has n it draw;:, along w I 



ran form mally at the orifice of the 



Jporea are detained for a moment 1 i pin- into th. 



Influence oj Light and Heat. Usually tl • 

 which light comes ; but sometimes it is the conto 

 light In other cases some will go one v. 

 having most vitalitj Bought the tight, and those with 



cheria for instance, they have no predilection, n 

 round in mucilaginous species, such as Laminai 

 manifest influence over the emission ofioospores; i 



