CONTENTS. 



CONTENTS OF No. 221, N.S., DECEMBER, 1910. 



MEMOIRS : PAGE 



The Early Development of the Miiroupialia, with Special Kefereuce 

 to the Native Ciit (Dasyiirus viverrinvis). (Contribiitious 

 to the Embryology of the Marsvipialia, 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. sj}.), Avith Eeiiiarks on the species Hamingia i jimai 

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



A Study of the Blood of certain Coleoptera: Dytiscus margi- 

 nalis and Hydrophilns piceus. By J. 0. Wakelin 

 Barratt, M.D., D.Sc, and George Arnold, M.Sc, from the 

 Cancer Research Laboratory, University of Liverpool. (With 

 Plate 11) . . .149 



CONTENTS OF No. 222, N.S., FEBRUARY, lull. 



MEMOIRS : 



On the Morphology of the Cranial Muscles in Some Vertebrates. 

 By P. H. Edgeworth, M.D., D.Sc, Professor of Medicine, 

 University of Bristol. (With 100 Text-figures) . l'J7 



A Monograph of the Tape-worms of the Sub-family Avitelliuinte, 

 being a Revision of the Genus Stilesia, and an Account of the 

 Histology of Avitellina centripvxnctata (Riv.). By Li;wis 

 Henry Gough, Ph.D. (With Plates 12-14 and 6 Text-figure.s) 317 



Brief Notes on the Structiire and Development of Spirochuita 

 anodontse Keys.selitz. By W. Cecil Bosanquet,M.D. (With 

 Plate 1.5) ..... . 387 



