New Series, No. 236 (Vol. 59, Part 4). Price 10s. net 
Subscription per volume (of 4 parts) 40s. net. 
FEBRUAKY, 1914. 
THE 
QUARTERLY JOURNAL 
OF 
MICROSCOPICAL SCIENCE. 
EDITED KY 
SiE RAY LANKESTER, K.C.B., M.A., D.Sc., LL.D., P.R.S., 
HOINUHAKY FKI.LOW OF EXBTKR COI.I.KGK AND HONORARY STUDENT OF CHRIST CHURCH, OXFORD ; 
MEMBER OF THK INSTITUTK OF FRANCK (ASSOCltl ^TRANGEB DE I-’aCADEMIE DES SCIENCES) ; 
CORRK8FONDUNT OF THK IMFKRIAl, ACADEMY OF SCIKNCKS OF ST. PETERSBURG, AND OF THK, 
ACADKMY OF SCIENCES OF F U II, A DE I.F II I A , AND OF THK ROYAI, ACADEMY OF SCIENCES 
OF TURIN; foreign MEMBER OP THE ROYAI, SOCIETY OF SCIENCES OF 
GStTINGEN, AND OF THK ROYAI, BOHEMIAN SOCIETY OF SCIENCES, AND 
OP THE ACADKMY OF THE LINCKI OF ROME, AND OF TUB AMERICAN 
ACADEMY OF ARTS AND SCIENCES OP BOSTON ASSOCIATE OF THK 
ROYAI, ACADEMY OF BEUGIUM; HONORARY MEMBER OF THK 
NEW YORK ACADKMY OF SCIENCES, AND OF THE 
CAMBRIDGE P H 1 1,0 8 O P 11 IC A I, SOCIETY, AND OF 
THK ROYAI, PHYSICAL SOCIETY OF EDIN- 
BURGH, AND OF THE 
BIOLOGICAL SOCIETY OF PARIS, AND OF THE CALIFORNIA ACADEMY OF SCIKNCKS OF SAN FRANCISCO, AND 
OF THE ROYAL ZOOLOGICAL AND MALACOLOGIC AI, SOCIETY OF BELGIU.M; 
CORRESPONDING MEMBER OF THE 8ENKENBERG ACADEMY OF FRAN KFURT-A-M ; 
FOREIGN ASSOCIATE OF THK NATIONAL ACADKMY OF SCIENCES, U.S.. AND MEMBER OF THE 
AMERICAN PHILOSOPHICAL SOCIETY ; 
HONORARY FELLOW OF THE ROYAL SOCIETY OF EDINBURGH! 
LATE DIRECTOR OF THE NATURAI, HISTORY DEPARTMENTS OF THK BRITISH MUSEUM; I,ATE PRESIDENT OF THE 
BRITISH ASSOCIATION FOR THE ADVANCEMENT OP SCIENCE; LATE FULLKRIAN PROFESSOR OF 
PHYSIOLOGY IN THE ROYAL INSTITUTION OF GREAT BRITAIN ! 
LATE LINACRE PROFESSOR OF COMPARATIVE ANATOMY AND FELLOW OF MERTON C O LLE GE , O X F O R D ; 
EMERITUS PROFESSOR OF ZOOLOGY AND COMPARATIVE ANATOMY IN UNIVERSITY COLLEGE, UNIVERSITY OF LONDON. 
WITH THE CO-OPETIATION OF 
SYDNEY J. HICKSON, M.A., F.R.S., 
BEYRR PKOFK880R OP ZOOLOGY IN THE UNIVERSITY OP MANCHKSTKK; 
E. A. MINCHIN, M.A., F.R.S., 
PROFESSOR OF PROTOZOOLOGY IN THE UNIVERSITY OK LONDON^ 
GILBERT C. BOURNE, M.A., D.Sc., F.R.S., 
LINACRE PROFESSOR OF COMPARATIVE ANATOMY, AND FELLOW OF MERTON COLLEGE, OXFORD ; 
AND 
J. GRAHAM KERR, M.A., F.R.S., 
REGIUS PROFESSOR OF ZOOLOGY IN THE UNIVERSITY OF GLASGOW. 
WITH LITHOGRAPHIC PLATES AND TEXT-FIGURES. 
LONDON. 
J. & A. CHURCHILL, 7 GREAT MARLBOROUGH STREET, 
1914. 
Adlard and Son, Impr.,] 
[London and Dorking. 
