CONTENTS OF No. 221.-New Series, 



MEMOIRS : 



PAGE 



The Early Development of the Marsupialia, with Special Keference to 

 the Native Cat (Dasyurus viveri-inixs). (Contributions to the 

 Embryology of the Marsupialia, IV.) By J. P. Hill, D.Sc, 

 Jodrell Professor of Zoology and Comparative Anatomy, University 

 of London, University College. (With Plates 1-9 and 2 Text- 

 figures) . . . . . . .1 



Notes on a Deep-Sea Echiuroid, Acanthohamingia shiplei (n.g. 

 et n. sp.), with Remarks on the species Hamingia ijimai Ikeda. 

 By IwAji Ikeda. (With Plate 10) . . . .135 



A Study of the Blood of certain Coleoptera: Dytiscus marginalis 

 and Hydrophilus piceus. By J. O. Wakklin Barbatt, M.D., 

 D.Sc, and George Arnold, M.Sc, from the Cancer Research Labo- 

 ratory (Mrs. Sutton Timmis Memorial), University of Liverpool. 

 (With Plate H) • • . • • .149 



