The Germination and Developnnent of 

 Sonne Marine Algae. IL 



By 



Kicliisaburo Yeiitlo. 



{With Plate JI) 



The result I have attained by the artiliclal culture of the 

 Porpirrra-spores" induces me to suggest that the life- history of 

 the marine algae will be much more complicated than is 

 generally assumed by modern botanists. By an observation 

 on the germination of the zoospores of Phyllitis Fascia KuTZ. 

 I am more encouraged to hold this view. 



When I started the experiment on the germination of the 

 Porphyra-spores, I tried a similar experiment with the swarm- 

 spores of Phyllitis. The aim of the latter w^as also to observe 

 the behaviour of the spores during the non-appearing stage of 

 the plant, reviewing at the same time what has been stated 

 about by Reixke'' thirty years ago, but nobody since has 

 touched the subject. It was hoped, too, that by taking 

 this species as the material, the nature of cgespitose fronds 

 could be more clearly explained. 



There is a considerable number of species of marine algae 

 which give rise to numerous fronds from a single rhizoid. They 

 are equally diagnosed CcEspitose or multlcipital fronds. Careful 



1) Yendo: The Gerrainatioii and Development of Some Marine Algae. 1. 

 (Botanical Magazine, Tokyo. Vol. XXXIII, No. 388). 



2) Keinke: Ueber die Entwicklung von rhyUitis, Scytosiphon und Aaperococcus. 

 (Pringsheim. Jahrb. fiir wiss. Bot. 11 Bd.) 



