Plate VIII. 



1. Sertularia argentella, nat. size. 1a, enlarged, p. 



117. 



2. Sertularia abietina, nat. size. 2a, Calycles enlarged, 



p. 115. 



3. Hydrallmania falcata, nat. size. 3a, Calycles en- 



larged, p. 118. 



