Contents. 



IX 



PAGE 



XIX. HYDROZOA 310 



A prelirainai'y account, by Edward T. LJhownk, 

 University College, London. 



XX. PORIFERA.. 



By Iv. KiRKPATRICK. 



;{i^ 



XXI. CRYPTOGAMIA 311* 



Musci. 

 By A. Gepp, M.A., F.L.S. 



LiCHENES. 



By V. H. Blackman, M.A., F.L.S. 



Algae. 

 By Miss E. S. Barton. 



Peridineae. 

 By A'. H. Blackman, M.A., F.L.S. 



XXII. REPORT ON THE ROCK SPECIMENS .. 321 

 By G. T. Prick, M.A., F.G.S., Assist. Mineral 

 Dept., British Museum. 



Llll 



XXIIL INDEX 



333 



