A Monograph of the Genus Alarla. 



57 



tlie whole frond is washed away from the substratum. There is, 

 therefore, very little difference in the life histories of Lainhmria 

 and Alarla on our coast. 



The figure shown below is a diagram to indicate the life 

 histories of Alarla, Lamlnarla, Ccstarla and Undarla, as found on 



