194 



agree with Aglaozonia canariensis described by Sauvageau. As 

 his preliminary note on this alga is without any figures and a 

 certain identification therefore was difficult, I have sent a drawing 

 to Professor Sauvageau and asked him if my supposition was 

 correct. Professor Sauvageau quite agreed with me and has also 

 most kindly sent me some material of his plant, to compare 

 wdth the mine. 



As already mentioned, my plant was found on exposed coasts 

 and it was here growing as large expansions covering the rocks 



Fig. 150. Aglaozonia canariensis Sauv. 



a, transverse section of the thallus with rhizoids. b, edge of the thallus seen 



irom above, c, transverse section of the edge of the thallus. d, transverse 



section of the thallus with voung hairs. (About TO: 1). 



with a dark-brown crust. It is of a coriaceous consistency. The 

 edges of the thallus are roundish lobed and the lobes grow 

 more or less over each other in a similar way as in Raljsia. It 

 adheres firmly to the substratum by means of numerous multi- 

 cellular rhizoids (fig. 150 a) ending in a disc wdth irregularly 

 divided, often coralliform prolongations. The cells in the un- 

 branched part of the rhizoids are often swollen in the middle, this 

 assuming thereby a moniliform appearance, but quite cylindric 

 cells also occur. 



If we examine the thallus from above (Fig. 150 b) wo find 



