PLATES IN VOL. XIIL 



Plate I."j 



yyj" f New species of Verrucaria and Sagedia. 

 IV. I 



VI I 



Yjj f British Graphidese. 



Villi J 



IX T 



y' >■ Mechanism of Aquatic Respiration in Invertebrate Animals. 



XL-) 

 XII. i^ New British Echinodermata. 

 XIIL J 



XIV. Desmarestia Dresnayi. — Closterium Griffithii. 

 YVT r -^^^ British Fungi. 

 YVTTT f Mechanism of Aquatic Respu^tion in Invertebrate Animals. 



