PLATE LXXIII. 



I'lG. 



1. BowERBANKiA iMBRiCATA^ p. 519; ercct form. 



-, nat. size. 



3. Vesicularta spinosa, p. 513; nat. size. 



4. , a fully developed branch, with the spi- 

 nous extremities. 



5, 6. , growing branches, with blunt extre- 

 mities. 



-, a young shoot, showing the endosarc 



and the mode in which the zooecia are connected 

 with it. 



