PLATE XXX. 



Fid. 



1. OBELIA PLICATA, p. 159, nat. size. From a drawing by 



Mr. Tuffeii West. 



1 a. A shoot, magnified (T. H.). 



2. CAMPANULARIA NEGLECTA, p. 171, a single calycle, 



magnified. 



2 a. A portion, magnified, showing the polypite. From 



drawings by Mr. Alder. 2 b, 2 c. The gonotheca, 

 magnified (T. H.). 2 d. The same, with extra - 

 capsular marsupinm (T. H.). 



