ue 



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New Series, No. 187 (Vol. 47, Part 3). 



Price 10s. 



DECEMBEE, 1903. 

 THE 



QUARTERLY JOURNAL 



OF 



MICROSCOPICAL SCIENCE. 



EUITBU HY 



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



HONORARY FELLOW OF EXETER COLLEGE , OXFORD ; COR RKSPOXDENT OK THE INSTITUTE OF FRANCE 

 AND OF THE IMPERIAL ACADEMY OF SCIENCES OP ST. PETERSBURG, AND OF THE ACADKMV 

 OF SCIENCES OP P U ILADE LP HIA ; FOREIGN MEMBKR OF THE ROYAL SOCIETY OF 

 SCIENCES OF GOTTINGEN AND OF THE ROYAL BOHEMIAN SOCIETY OF SCIENCES, 

 AND OF THE ACADEMY OF THE LINCEI OF ROME, AND OF THE AMERICAN 

 ACADEMY OF ARTS AND SCIENCES OF BOSTON ; ASSOCIATE OF THE 

 ROYAL ACADEMY OF BELGIUM; HONORARY MEMBER <»F 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 FARIS; 

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

 THE AMERICAN PHILOSOPHICAL SOCIETY ; 

 DIRECTOR OF THE NATURAL HISTORY DEPARTMENTS OF THE BRITISH MUSEUM; I.ATE FULLRRIAN 

 PROFESSOR OF PHYSIOLOGY IN THE ROYAL INSTITUTION OF GREAT BRITAIN; 

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



WITH TICE CO-OPKUATION OF 



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



FELLOW AND TUTOR OF THIMTY COLLEGE, CAMBRIDGE; 



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



l.I^ACKE PROFESSOR OF COMPARATIVE AXATOMV AND FEM.OW OF MEKTON COLLEGE. OXFORD: 

 LATE FRI.LOW OF ST. JOHN'S COLLEGE, UAMBBIUCiE; 



AND 



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



BEVEK PROFESSOR OF ZOOLOGY IX THE OWENS COLLEGE, MANCHESTER. 



WITH LITHOGRAPHIC PLATES AND ENGRAVINGS ON WOOD. 



LONDON: 

 J. & A. CHCJKCHILL, 7 GREAT MAKLBOROUGH STREET. 



1903. 



AtUard and Sou,] 



[Louilon and Dorkini,'-. 



