DESCEIPTION OF PLATES. xi 



Plate VII. 



1. Sertularia pumila, nat. size. 1a, Calyclesand gono- 



phore enlarged, p. 112. 



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



p. 115. 



3. Sertularia operculata, nat. size. 3a, Calycles en- 



larged, p. 113. 



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. 



Plate IX. 



1. Thuiaria thuja, nat. size, p. 119. 



2. Antennularia antennina, nat. size, p. 123. 



3. Plumularia halecioides, nat. size, p. 127. 



4. Plumularia setacea, nat. size. 4a, Calycles en- 



larged, p. 124. 



5. Aglaophenia pluma, nat. size, p. 128. 



6. Halicornaria pennatula, nat. size (after Hincks), 



p. 132. 



7. Hydra viridis, enlarged, p. 135. 



Plate X. 



1. Aglaophenia plumosa, nat. size. 1a, Calycles en- 



larged, p. 129. 



2. Corbula of A. pluma, see p. 128. 



