﻿SEP 
  15 
  19U4 
  

  

  New 
  Series, 
  No. 
  190 
  (Vol. 
  48, 
  Part 
  2). 
  

  

  SEPTEMBER, 
  1904. 
  

  

  THE 
  

  

  Price 
  10s. 
  

  

  QUARTERLY 
  JOURNAL 
  

  

  MICROSCOPICAL 
  SCONCE. 
  

  

  EDITED 
  BY 
  

  

  E. 
  RAY 
  LANKESTER, 
  M.A., 
  LL.D., 
  E.R.S., 
  

  

  HONORARY 
  FKI.LOW 
  OV 
  EXETER 
  COLLEGE, 
  OXFORD 
  ; 
  CORRESPONDENT 
  OF 
  THE 
  INSTITUTE 
  OV 
  FUANCK 
  

   AND 
  OF 
  THE 
  IMPERIAL 
  ACADEMY- 
  OF 
  SCIENCES 
  OP 
  ST- 
  PETEKSBURG, 
  AND 
  OF 
  THE 
  ACAUKMY 
  

   OF 
  SCIENCES 
  OF 
  PHILADELPHIA; 
  FOREIGN 
  MEMBER 
  OF 
  THE 
  ROYAL 
  SOCIETY 
  OF 
  

   SCIENCES 
  OF 
  GOTTINGEN 
  AND 
  OF 
  TH 
  E 
  HO 
  YAL 
  BOHEMIA 
  N 
  SOCIETY 
  OF 
  SCIENCES, 
  

   A?iD 
  OF 
  THE 
  ACADEMY 
  OF 
  THE 
  LINCEI 
  OF 
  UOMK, 
  AND 
  OF 
  THB 
  AMERICAN 
  

   ACADEMY 
  OF 
  ARTS 
  AND 
  SCIENCES 
  OF 
  BOSTON 
  : 
  ASSOCIATE 
  OK 
  THE 
  

   BOVAL 
  ACADEMY 
  OF 
  BELGIUM; 
  HONORARY 
  MEMBER 
  oF 
  THE 
  

   NEW 
  YORK 
  ACADEMY 
  OF 
  SCIENCES, 
  AND 
  OF 
  THE 
  

   CAMBRIDGE 
  PHILOSOPHICAL 
  SOCIETY, 
  AND 
  OF 
  

   THE 
  ROYAL 
  PHYSICAL 
  SOCIETY 
  OF 
  EDIN- 
  

   BURGH 
  ; 
  HONORARY 
  MEMBER 
  OF 
  THE 
  

   BIOLOGICAL 
  SOCIETY 
  OF 
  PARIS; 
  

   FOREIGN 
  ASSOCIATE 
  OF 
  THE 
  NATIONAL 
  ACADEMY 
  OF 
  SCIENCES, 
  U.S., 
  AND 
  MEMBER 
  OF 
  

   THE 
  AMERICAN 
  PHILOSOPHIC 
  AL 
  SOCIETY 
  ; 
  

   DIRECTOR 
  OF 
  THE 
  NATURAL 
  HISTORY 
  DEPARTMENTS 
  OF 
  THE 
  BRITISH 
  MUSEUM; 
  LATE 
  FUM.KKIAN 
  

   PROFESSOR 
  OF 
  PHYSIOLOGY 
  IN 
  THE 
  ROYAL 
  I 
  NSTITUTION 
  OF 
  GR 
  E 
  AT 
  BRITAIN 
  ; 
  

   LATE 
  LINACRE 
  PROFESSOR 
  OF 
  COMPARATIVE 
  ANATOMY 
  AND 
  FELLOW 
  OF 
  MERTON 
  COLLEGE, 
  OXFORD- 
  

  

  WITH 
  THE 
  CO-OPEKATION 
  OF 
  

  

  ADAM 
  SEDGWICK, 
  M.A., 
  F.R.S., 
  

  

  FBM«OW 
  AND 
  TUTOR 
  OF 
  TRINITY 
  COLLEGE, 
  CAMBRIDGE; 
  

  

  W. 
  F. 
  R. 
  WELDON, 
  M.A., 
  F.R.S., 
  

  

  SYDNEY 
  J. 
  HICKSON, 
  M.A., 
  F.R.S., 
  

  

  BEYER 
  PROFESSOR 
  OK 
  ZOOLOGY 
  IN 
  THE 
  OWENS 
  COLLEGE, 
  MANCHESTKR. 
  

  

  WITH 
  LITHOGRAPHIC 
  PLATES 
  AND 
  ENGRAVINGS 
  ON 
  WOOD. 
  

  

  LONDON 
  : 
  

  

  J. 
  & 
  A. 
  CHURCHILL, 
  7 
  GREAT 
  MARLBOROUGH 
  STREET. 
  

  

  1904. 
  

  

  Atllarcl 
  ancl 
  Son,] 
  

  

  [London 
  ancl 
  Dorking 
  

  

  