﻿PROCEEDINGS 
  

  

  OF 
  

  

  THE 
  ROYAL 
  SOCI 
  

  

  Series 
  B. 
  Vol. 
  91. 
  No. 
  B 
  640. 
  

  

  BIOLOGICAL 
  SCIENCES. 
  

  

  CONTENTS. 
  

  

  Page 
  

  

  The 
  Enzymes 
  of 
  B. 
  Coli 
  Communis 
  which 
  are 
  Concerned 
  in 
  the 
  Decomposi- 
  

   tion 
  of 
  Glucose 
  and 
  Mannitol. 
  Part 
  IV. 
  — 
  The 
  Fermentation 
  of 
  Glucose 
  

   in 
  the 
  Presence 
  of 
  Formic 
  Acid. 
  By 
  EGERTON 
  CHARLES 
  GREY 
  

   (John 
  Foulerton 
  Student) 
  . 
  . 
  294 
  

  

  Studies 
  on 
  Synapsis. 
  II. 
  — 
  Parallel 
  Conjugation 
  and 
  the 
  Prophase 
  Complex 
  

   in 
  Periplaneta 
  with 
  Special 
  Reference 
  to 
  the 
  Premeiotic 
  Telophase. 
  By 
  

   LANCELOT 
  T. 
  HOGBEN, 
  M.A., 
  B.Sc. 
  (Lecturer 
  in 
  Zoology, 
  Imperial 
  

   College 
  of 
  Science). 
  (Plates 
  10-12) 
  3©S 
  

  

  On 
  some 
  Rostro-carinate 
  Flint 
  Implements 
  and 
  Allied 
  Forms. 
  By 
  Sir 
  

  

  E. 
  RAY 
  LANKESTER. 
  K.C.B.. 
  F.R.S 
  33<> 
  

  

  Obituary 
  Notices 
  of 
  Fellows 
  deceased 
  : 
  — 
  Horace 
  Bolingbroke 
  Woodward 
  ; 
  

   James 
  Geikie 
  ; 
  Gustaf 
  Magnus 
  Retzius 
  (with 
  portrait) 
  ; 
  Ludimar 
  

   Hermann 
  ........... 
  xxxi 
  — 
  xl 
  

  

  PRINTED 
  AND 
  PUBLISHED 
  FOR 
  THE 
  ROYAL 
  SOCIETY 
  BY 
  

   HARRISON 
  & 
  SONS. 
  Ltd.. 
  44—47. 
  ST. 
  MARTIN'S 
  LANE. 
  LONDON. 
  W.C.2. 
  

  

  Price 
  Four 
  Shillings 
  and 
  Sixpence. 
  

  

  No. 
  B 
  640. 
  

  

  August 
  7, 
  1920. 
  

  

  