QUARTERLY JOURNAL 
OF 
MICROSCOPICAL SCIENCE. 
EDITED BY 
Sir ray LANKESTER, K.C.B., M.A., D.Sc., LL.D., F.R.S., 
ilONOKAUt FBt.I/OW UF BXRTRK COI.I.K6K AND HONORARY STUDBNT OK CHRIST CHURCH, OXFORD; 
MEMBER OK THK INSTITUTB OK FHANCR (aSSOCI^ ^TRANGER DE I/aCADEMIE DBS SCIENCES); 
CUKKR8P0NDK;«T of the IMPKUtAI. ACADEMY OF SCIENCES OF ST. PETERSBURG, AND OP THE 
ACADEMY OF SCIENCES OF P !! 1 1. A DK I.P 11 1 A , AND OF THE ROYAI. ACADEMY OF SCIENCES 
OF TURIN; FOREIGN .MEMBER OF THE ROYAl> SOCIETY OF SCIENCES OF 
GOTTINGEN, AND OK THE ROYAI. BOHEMIAN SOCIETY OF SCIENCES, AND 
OF THE ACADEMY OF THE MNCEI OF HOME, AND OP THE AMERICAN 
ACADEMY OF ARTS AND SCIENCES OF BOSTON: ASSOCIATE OF THK 
BOYAT. ACADEMY OF BEI.6IUM; HONORARY MEMBER OP THE 
NEW YORK ACADEMY OK SCIENCES, AND OK THE 
CAMDKID6B P H I I.US O P II IC AI. SOCIETY, AND OK 
TUB ROYAI. PHY8ICAI. SOCIETY OK EDIN- 
BURGH, AND OP THE 
HIUI.OGICAI. SOCIETY OF PARIS, AND OP THE CALIFORNIA ACADEMY OF SCIENCES OK SAN FRANCISCO. AND 
OF THE ROYAL ZOOLOGICAL AND MALACOLOGICAL SOCIETY OK BELGIUM; 
CORRESPONDING MEMBER OK THE SBNKBNBERG ACADEMY OK K R A N KKU RT* A- M ; 
FOREIGN ASSOCIATE OP THE NATIONAL ACADEMY OF SCIENCES. U.8.. AND MEMBER OF THE 
AMERICAN rilll.OSOPHICAI. SOCIETY ; 
HONORARY FELLOW OF THE ROYAL SOCIETY OP EDINBURGH’, 
LATE DIRECTOR OF THE NATURAL HISTORY DEPARTMENTS OF THK BRITISH MUSEUM; LATE PRESIDENT OF THE 
BRITISH ASSOCIATION FOR THE ADVANCEMENT OF SCIENCE,’ LATE FUM.KRIAN PROFESSOR OF 
P1ITBI0L06Y IN THE ROYAL INSTITUTION OF GREAT BRITAIN . 
LATE I.INACBR PROFESSOR OF COMPARATIVE ANATOMY AND FKLI.OTV OF MERTON C OI.LE G B , OX KO R D ; 
EMKIIITUS PROFESSOR OK ZOOLOGY AND COMPARATIVE ANATOMY IN UNIVERSITY COLLEGE, UNIVERSITY OK LONDON. 
WITH THK CO-OPEUATION OF 
ADAM SEDGWICK, M.A., F.R.S., 
PBI.I.OW OK TRINITY COLLEGE, CAMBRIDGE, AND PKOKBSSOR OP ZOOLOGY IN THE IMPERIAL COLLEGE OK 
SCIENCE AND TECHNOLOGY, LONDON; 
SYDNEY J. HICKSON, M.A., F.R.S., 
BEYER PROFESSOR OF ZOOLOGY IN THE UNIVERSITY OK MANCHESTER; 
E. A. MINCHIN, M.A., F.R.S., 
PROFESSOR OK PROTOZOOLOGY IN THE UNIVERSITY OF LONDON; 
AND 
GILBERT C. BOURNE, M.A., D.Sc., F.R.S., 
f.INACRE PROFESSOR OK COMPARATIVE ANATOMY, AND FKI.LOW OK MERTON COLLEGE, OXFORD. 
VOLUME 58. — New Series. 
JMifI) Sitbograp^ic ^lalis anb CeYt-<^igures. 
LONDON : 
J. A A. CHURCHILL, 7, GREAT MARLBOROUGH STREET 
