CONTENTS. 



CONTENTS OJ^^ No. 161, N.S., MARCH, 1898. 

 MEMOIRS : PAGE 



The Habits and Structure of Arenicola marina. By F. W. 

 Gamble, M.Sc, andJ. H. Ashworth, B.Sc, Demonstrators and 

 Assistant Lecturers in Zoology, Owens College, Manchester. 

 (With Plates 1—5) 1 



The Aseptic Cultivation of Mycetozoa. By Casper O. Miller, 

 M.D. (With Plates 6 and 7) 43 



On the Development of Tubulipora, and on some British and 

 Northern Species of this Genus. By Sidney F. Harmer, Sc.D., 

 Fellow of King's College, Cambridge ; Superintendent of the 

 University Museum of Zoology. (With Plates 8—10) . . 73 



The Molluscs of the Great African Lakes. — L Distribution. By 

 J. E. S. Moore . . . . . . .159 



The Molluscs of the Great African Lakes. — II. The Anatomy of the 

 Typhobias, with a description of the New Genus Bathanalia. By 

 J. E. S. Moore. (With Plates 11—14) . . .181 



CONTENTS OE No. 162, N.S., JUNE, 1898. 



MEMOIRS : 



The Segmentation of the Ovum of the Sheep, with Observations on 

 the Hypothesis of a Hypoblastic Origin for theTrophoblast. By 

 Richard Assheton, M.A. (With Plates 15—18) . . 205 



On the Heart-body and Coelomic Fluid of Certain Polychajta. By 

 Lionel James Picton, B.A. (With Plates 19—22) . . 263 



