CONTENTS OF No. 169- New Series. 



MEMOIRS : 



PAGE 



Note on a New Britibh Echiuroid Gepliyrean, with Remarks on the 

 Genera Thalassema and Hamingia. By W. A.Herdman, D.Sc, 

 P.R.S., Professor of Natural History in University College, Liver- 

 pool. (With Plates 27 and 28) 367 



The Placentatiou of Perameles. (Contributions to the Embryology of 

 the Marsupialia — I). By Jas. P.Hill, Demonstrator of Biology in 

 the University of Sydney, N.S.W. (With Plates 29—33) . . 385 



On the Green Pigment of the Intestinal Wall of the Annelid 

 Clisetopterus. By E. Ray Lankestee, M.A., LL.D., E.R.S., 

 Linacre Professor and Fellow of Merton College, Oxford. (With 

 Plates 34— 37) 447 



