CONTENTS. 



Pbepace ...... 



Memoir of Db. Bowerbank, bt 0. Tyler, F.L.S. 

 Intbodttction ..... 



Classified List of British Sponges . 

 Geographical Distribution of British Sponges 

 British Spongiad*, Obdbr Oalcabea 



„ „ „ SiLICEA 



„ „ „ Keratosa . 



Catalogue of Works and Papers on Sponges 

 Appendix of British Sponges not referred to by Dr 

 Bowerbank .... 



A.— Calcabeous Sponges of Ernst Haeckel 

 „ B. — The Genus Cliona— Species of Hancock 

 C. — Various British Sponges 

 Index ........ 



vn 



xiii 



1 



5 



15 



25 



27 



183 



191 



225 

 225 

 233 

 238 

 243 



