CONTENTS OF No. I71.-New Series. 



MEMOIRS 



The Anatomy and Classification of tlie Arenicolidse, with some Obser- 

 vations on their Post-larval Stages. By F. W. Gamble, M.Sc, 

 and J. H. Ashworth, D.Sc, Demonstrators and Assistant Lecturers 

 in Zoology, Owens College, Manchester. (With Plates 22—29) . 419 



Diagrams illustrating the Life-History of the Parasites of Malaria. 

 By Ronald Ross, D.P.H., M.R.C.S, Lecturer in Tropical 

 Medicine, University College, Liverpool, and R. Pielding-Ould, 

 M.A., M.B., Acting Demonstrator, Liverpool School of Tropical 

 Medicine. (Wiih Plates 30 and 31) 571 



Note on the Morphological Significance of the Various Phases of 

 Heeniamosbidce. P>y E. Ray Lankester 581 



