VII.] 



ACETABULARIA. 



165 



The two genera Acetabularia and Gymopolia may be briefly 

 described as recent types which are represented by trustworthy 

 fossil forms. 



Fig. 34. Acetabularia mediterranea Lamx. From a specimen in the 

 Cambridge Botanical Museum (nat. size). 



Acetabularia. Figs. 33, I, and 34. 

 With the exception of A. mediterranea Lamx. (fig. 34) the 

 few living species of this genus are confined to tropical seas. 



The habit of Acetahularia is well illustrated by the photo- 

 graph of a cluster of plants of .4. mediterranea Lamx.^ reproduced 

 1 Lamouroux gives a figure of Acetabularia, and includes this genus with 

 several other algae in the animal kingdom (Lamouroux [21] p. 19, PI. lxix.). 



