CONTENTS. 



CONTENTS OF No. CXXIV, N.S., NOVEMBER, 1890. 



MEMOIRS : PAGE 



On the Structure of a New Genus of Oligochseta (Deodrilus), 

 and on the Presence of Anal Nephridia in Acanthodrilus. 

 By Fkank E. Beddakd, M.A., Prosector of the Zoological So- 

 ciety of London. (With Plates XXXIII and XXXIIIa) . 467 



Excretory Tubules in Amphioxus lauceolatus. By F. Ebnest 

 Weiss, B.Sc, F.L.S., University College, London, (With 

 Plates XXXI \r and XXXV) 489 



Studies in Mammalian Embryology. II. — The Development of the 

 Germinal Layers of S or ex vulgaris. By A. A. W. Hitbeecht, 

 LL.D., C.M.Z.S., Professor of Zoology in the University of 

 Utrecht. (With Plates XXXVI— XLII) . . .499 



Terminations of Nerves in the Nuclei of the Epithelial Cells of 

 Tortoise-shell. By John Bekky Hatckaft, M.D., D.Sc. (from 

 the Physiological Laboratory of the University of Edinburgh). 

 (With Plate XLIII) 563 



Title, Contents, and Index. 



