38 



Dansk Botanisk Arkiv, Bd. 2. Nr. 2. 



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 

 with the mine. 



As already mentioned, my plant was found on exposed coasts 

 and it was here growing as large expansions covering the rocks 



Fig. 24. Aglaozonia canariensis Sau v. 



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



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



section of the thallus with young hairs. (About 70: 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 Ralfsia. It 

 adheres firmly to the substratum by means of numerous multi- 

 cellular rhizoids (fig. 24 a) ending in a disc with 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. 24 b) we find 



