PLATE XI. 



FIG. 



1. BuGULA FLABELLATA, p. 80 ; a portioii of a shoot, 

 nat. size. 



2, 3. , front and dorsal surfaces. 



4. ,, avicularium. 



5. BuGULA CALATHUS, p. 82 ; nat. size. 

 6, 7. , front and dorsal surfaces. 



8. , avicularia. 



