Jj 



New Series, No. 181 (Vol. 46, Part 1). Price 10s. 



JULY, 1902. 

 THE 



QUARTERLY JOURNAL 



A^o^ 



OP 



MICROSCOPICAL SCIENCE. 



EDITED BY 



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



HONORARY FELLOW OF EXETER COLLEGE, OXFOUU ; CORRESPONDENT OF THE INSTITUTE OF FUANCF 



AND OF THE IMPERIAL ACADEMY OF SCIENCES OP ST- PETERSBURG, AND OF THE ACADEMY 



OF SCIENCES OF PHILADELPHIA; FOREIGN MEMBER OF THE ROYAL BOHEMIAN 



SOCIETY OK SCIE^ICES, AND OF THE ACADEMY OF THE MNCEI 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 ACADEMY OF SCIENCES, AND OF THE 



CAMBRIDGE PHILOSOPHICAL SOCIETY, AND OF THE ROYAL 



PHYSICAL SOCIETY OF EDINBURGH ; HONORARY 



MEMBER OF THE BIOLOGICAL SOCIETY 



OF PARIS ; 



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



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., 



MNACRE PBOFESSOR OF COMPAKATIVE ANATOMY AND FEI.I.OW OF MKT.TON COM.EGE, OXFOHli; 

 LATE FEM.OW OF 3T. JOUN's COLLEGE, CAMBRIDGE; 



AND 



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



BEYER PROFESSOR OF ZOOLOGY IN THE OWENS COLLEGE, MANCHESTKB. 



WITH LITHOGRAPHIC PLATES AND ENGRAVINGS ON WOOD. 



LONDON: 

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



1902. 



Adlard aud Sou,] 



[Bartholomew Closf . 



