PLATES IN VOL. XV. 



Plate I. New species of Diatomaceae. 

 II. Sertularia alata. 



III. Campanularia Integra. — Halia praetenuis. — Anomalous Oyster- 

 Shell. 

 IV. 



^ Fossil Echinoderms from the Island of Malta. 



VIII. Development of Actinophrjs Sol. — New species of Leech. 

 New species of Algae. 



IX. New British Diatomaceae. 



X "1 

 yj" >■ British Phalangiidae. 



