New Series, No. 214 (Vol. 54, Part 2). Price lOs. net. 
Subscription per volume (of 4 parts) 40s. net. 
OCTOBER, 1909. 
THE 
QUARTERLY JOURNAL 
OF 
MICROSCOPICAL SCIENCE. 
EDlTRh HY 
Sir ray LANKESTER, K.C.B., M.A., D.Sc., LL.D., F.R.S., 
MUNUKAKY rBl.LOW UK B.XBTUU CU M. K G K , O X KO K I) ; C U H K R5 P U X 1> B N T OK TUB INSTITUTB OK KRAXCR« 
AXD (IK TUB lUPBRIAI. ACADBMY OK SCtKXCKS UK 9T. FKTKH8BUKG, AND OP TUB ACADBMY 
UK BC18NCB8 OK P H I LA D Kl.P II 1 A , AND UK TUB ROYAL ACADEMY OP SCIRNCBS 
OK Turin; foreign .mkmbbk ok tub royal society op sciences ok 
gOtTINGBN, and ok tub KuYAI. QUIIBMIAN society ok SCIRNCBS. AND 
OK TUB ACADBMY OK TUB MNCKI UK UOMR« AND OK TUB AMKRICAN 
ACADEMY OK ARTS AND SCIENCES OK BOSTON ; ASSOCIATE OK TUR 
ROYAL ACADBMY OK BELGIUM; HONORARY MRMBKR OP THR 
NBW YORK ACADB.MY OK SCIRNCBS. AND OK TUR 
CAMBRIDGE PIIILUSOP II ICAL SOCIBTY, AND OK 
TUB ROYAL PHYSICAL 80C1RTY OP BDIN* 
BURGH. AND OK TUB 
BIOLOGICAL SOCIBTY OK PARIS* AND OF TUR CALIFORNIA ACADBMY OF SCIENCES OK SAN KUANCISCO, AND 
OK TUB ROYAL ZOOI^IGICAL AND M A L ACOLOGIC A L SOCIETY OK BELGIUM; 
CORBBSrONDING MEMBER OP TUR SKNKRNDEKG ACADEMY OF F R AN K KURT- A* M ; 
FOREIGN ASSOCIATE OK TUB NATIONAL ACADEMY OK SCIENCES. U>8.> AND MEMBER OK TUB 
AMERICAN rUlLOSOPUICAL SOCIBTY * 
UONORARY FELLOW OP THE ROYAL SOCIETY OK EDINBURGH; 
LATE llIKBCTUK OK TUB NATURAL HISTORY DEPARTMENTS OK TUR BRITISH MUSEUM; LATE PRKSIDKNT OF THE 
BRITISH ASSOCIATION FOR TUR ADVANCEMENT OK SCIENCR.* 1<ATR KUM.KIUAN PKUFK880R OP 
PHYSIOLOGY IN TUR ROYAL INSTITUTION OP OBRAT BRITAIN ; 
LATR LINACHR PROPRSSOR OF COMPARATIVE ANATOMY AND FELLOW OF MERTON COI.f.R GR , OX PU R D ; 
RMERITU8 PROFESSOR OF ZOOLOGY AND COMPARATIVE ANATOMY IN UNIVERSITY COLLEGE, UNIVERSITY OF LONDON. 
WITH THE CO-OPERATION OP 
ADAM SEDGWICK, M.A., F.R.S., 
PROFESSOR OP ZOOLOGY AND COMPARATIVE ANATOMY IN THE UNIVERSITY OF CAMBRIDGE 
SYDNEY J. HICKSON, M.A., F.R.S., 
BEYER PROFESSOR OK ZOOLOGY IN THE UNIVERSITY OF MANCHRSTKR; 
AND 
E. A. MINCHIN, M.A., 
PROFESSOR OF PROTOZOOLOGY IN THE UNIVERSITY OK LONDON. 
WITH LITHOGRAPHIC PLATES AND TEXT-FIGURES. 
LONDON. 
J. & A. CHURCHILL, 7 GREAT MARLBOROUGH STREET. 
1909. 
Adlanl and Son, Impr.,] 
[London and Dorking. 
