PLATES IN VOL. XIII. 



Plate L 



III \^^^ species of Vermcaria and Sagedia. 



iv! 



n'l 



[IL I 



rvj 



} 



v." 



Yjj ^ British Graphideae. 

 VIIl! 



IX 1 



Y* }■ Mechanism of Aquatic Respiration in Invertebrate Animals. 



XL-j 

 XII. y New British Echinodermata. 



XIII. J 



XIV. Desmarestia Dresnayi. — Closterium Griifithii. 

 ^^- 1 New British Fungi, 



XVIII I Mechanism of Aquatic Respiration in Invertebrate Animals. 



