CONTENTS OF No. 168. -New Series. 



MEMOIRS : 



PAGE 



The Structure and Metamor pilosis of the Larva of Spongilla 

 lacustris. By Ricbabd Evaks, B.A., Jesus College, Oxford. 

 (Witli Plates 35—41) 363 



On the Communication between tiie Ccelom and the Vascular System 

 in the Leech, Hirudo medicinalis. By Edwin S. Goodrich, 

 B.A., Aldrichian Demonstrator of Comp. Anatomy, Oxford, (With 

 Plates 42—44) 477 



Balanogiossus otagoensis, u. sp. By W. Blaxland Benham, 

 D.Sc, M.A., Professor of Biology in the University of Otago, New 

 Zealand. (With Plate 45) 497 



The Movements of Copepoda. By E. W. MacBride, Professor of 

 Zoology, McGill University, Montreal 505 



