QUAIITERLY 
OF 
JOURNAL 
EDITED BY 
Sib ray LANKESTBR, K.C.B., M.A., D.Sc., LL.D., F.R.S., 
IMINOHAKY KKM.OW OK K X 1C T K K COM.KGK ASH IIONOllAUY .STUDENT OF CHKIST CHURCH, OXKORD; 
MEMBER OK THE I N .S T I T U T 1C OK KKANCK (aSSOCiL T R A N G E R DE i/aCADKMIE 1) K S SCIENCE^) ; 
< O It K EH TON D K N T OK THE IMPERIAU A C A D 1C M Y OK SCIENCES K ST. PETERSBURG, AND OK THE 
ACADEMY OK SCIENCES OK F HI I. A D El, P II 1 A , AM) OF THE ROY A I, ACADEMY OF SCIENCES 
OK TURIN; FOREIGN MEMBER OK THE ROYAI. SOCIETY OK SCIENCES OK 
GOTTINGEN, AND OF THE UOYAU BOHEMIAN SOCIETY OK SCIENCES, AND 
OK THE ACADEMY OK THE MNCEI OK ROME, AND OK THK AMERICAN 
ACADEMY OK ARTS AM) SCIENCES OK U O s I O N ; ASSOCIATE OK TDK 
11 OVA I. ACADEMY OK BEI.GIUM; HONORARY MEMBER <»K TDK 
NEW YORK ACADEMY OF SCIENCES, AND OK THK 
CAMBRIDGE P H 1 1, 0 S O P H I C A I- SOCIETY, AND OP 
the ROYAI, PHYSICAI. SOCIETY OK EDIN- 
BURGH, AND OK THK 
Blol.oGICAI. SOCIETY OK PARIS, AND OF THK CAI.IFORNTA ACADEMY OF SCIENCES OF SAN FRANCISCO. AND 
OK THE ROYAI. ZOOI.OGICAI, AND M AI, ACOI.OGIC A I, SOCIETY OK BELGIUM; 
CORRESPONDING MEMBER OF THK 8KNKENBERG ACADEMY OK FRANKFURT A M; 
FOREIGN ASSOCIATE OK THK NATIONAL ACADEMY OF SCIENCES. U.S., AND MEMBER OK THK 
AMERICAN PHILOSOPHICAL SOCIETY ; 
HONORARY FELI.OW OF THE ROYAL SOCIETY OK KDINBIIRGH; 
LATE DIIlKfTOU OK T II K NATURAL HISTORY DEPARTMENTS OK THE BRITISH MUSEUM: 1,ATE PRESIDENT OF THE 
BRITISH YSSOCIATION FOR THE ADVANCEMENT OF SCIENCE; LATE KULLKRIAN PHOKKSSOR OK 
P H YSIOLOG Y IN THE ROYAI. INSTITUTION OK GREAT BRITAIN; 
LATE T.INACUK PROFESSOR OF COMPARATIVE ANATOMY AND FELI.OW OF MERTON C O I, I, K G E , O X K O R I> ; 
KMKIUTUS PROFESSOR Ol' ZOOLOGY A N D CO M P A ll A T I V E ANATOMY IN UNIVERSITY COLLEGE, UNIVERSITY OF I.ONDON 
WITH THE CO-OPEUATION OF 
SYDNEY J. HICKSON, M.A., F.R.S., 
BUYER PROFESSOR OK ZOOI.OGY IN THK UNIVERSITY OF MANCHESIKR; 
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., 
MNACKE PUOFKSSOIl OF COMPAUATIVK ANATOMY, AND FKM.OW OF MKRTON COI.I.FGIC, OXFORD ; 
AND 
J. GRAHAM KERR, M.A., P.R.S., 
REGIUS PROFESSOR OF ZOOI.OGY IN THE UNIVERSITY OF GI.ASGOIV. 
VOLUME 59.— New Series. 
anb CrU-Jfigurfs 
J. & A. CHURCHILL, 7, GREAT MARLBOROUGH STREET. 
I9J4. 
