JAN 23 190? 



New Series, No. 183 (Vol. 46, Part 3). 



"^S'^kTl DECEMBEE, 1902. 



Price 10s. 



THE 



QUARTERLY JOURNAL 



MICROSCOPICAL SCIENCE. 



EOlTKIl KY 



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



:iONOUARY FELLOW OF EXETER COLLEGE , OXKORD ; CORRESPONDENT OF THE INSTITUTE OK FRANCE 



AND OF THE IMPF.RIAL ACADEMY OF SCIENCES OF ST. PETERSBURG, AND OF THE ACADKMY 



OF SCIENCES OF PHILADELPHIA; FOREIGN MEMBER 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 OK THE ROYAL ACADEMY OF BELGIUM; HONORARY MEMBER 



OF THE NEW YORK ACADEIWY OF SCIENCES, AND OF THE 



CAMBRIDGE PHILOSOPHICAL SOCIETY, AND OF THE ROYAL 



PHYSICAL SOCIETY OF EDINBURGH ; HONORARY 



MEMBKR OF THE BIOLOGICAL SOCIETY 



OF PARIS; 



DIRECTOR OF THE NATURAL HISTORY DEPARTMENTS OF THE BRITISH MUSEUM; LATE FULLKRIAN 



PROFESSOR OF PHYSIOLOGY IN THE ROYAL INSTITUTION OF GREAT BRITAIN. 



WITH THE CO-OPERATION OF 



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



FELLOW AND TUTOR OF TRINITY COLLEGE, CAMBRIDGE; 



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



LINACRE PROFESSOR OF COMPARATIVE ANATOMY AND FELLOW OK MERTON COLLEGK, OXFORD; 

 LATE FELLOW OF ST. JOHN's COLLEGE, CAMBRIDGE; 



AND 



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



BEYER PROFESSOR OF ZOOLOGY IN THE OWENS COLLEGE, M ANC HEJJTK R . 



WITH LITHOGRAPHIC PLATES AND ENGRAVINGS ON WOOD. 



^ LONDON : 



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



1902. 



Adlardancl Son,] 



[Loudon ;ind Dorkiii 



