QUARTERLY JOURNAL 
OF 
MICROSCOPICAL SCIENCE.. 
Sir RAY LANKESTER, K.O.B., M.A., D.Sc., LL.D., F.R.S., 
HONOBAKT FELLOW OK EXBTKK CO LL B G E , O X K O U U ; C O R B R S P O.N D B X T OK TUB INSTITUTE OK FRANCE, 
AND OP TUB IMFKRIAL ACADEMY OF SCIENCES OF ST- PETERSBURG. AND OK TUE ACADEMY 
OF SCIENCES OK P II I L A D B LF U I A , AND OF TUB ROYAL ACADEMY OF SCIENCES 
OF TURIN; FOREIGN MEMBER OK TUB ROYAL SOCIETY OF SCIENCES OF 
GOtTINGBN, AND OF TUB KUYAI. SOUBMIAN SOCIETY OF SCIENCES, AND 
OF TUB ACADEMY OF THE I.INCK! OF ROME, AND OF TIIK AMERICAN 
ACADEMY OF ARTS AND SCIENCES OF BOSTON ; ASSOCIATE OK THE 
ROYAL ACADEMY OP BELGIUM; UONORARY MEMBER <>K TUB 
NEW YORK ACADEMY OK SCIENCES. AND OK TIIK 
CAMUKIDGB PHILOSOPHICAL SOCIETY, AND OK 
THE ROYAL PHYSICAL SOCIETY OK EDIN- 
BURGH, AND OK THE 
BIOLOGICAL SOCIETY OK PARIS, AND OP TIIK CALIFORNIA ACADEMY OF SCIENCES OF SAN FRANCISCO. AND 
OK TUK ROYAL ZOOLOGICAL AND MALACOLOGICAL SOCIETY OK BELGIUM; 
CORRESPONDING MEMBER OK TUK SKNKBNBERG ACADEMY OF FRANKPURT*A*M ; 
FOREIGN ASSOCIATE OF TUK NATIONAL ACADEMY OK SCIENCES. U.S.. AND MEMBER OK TUB 
AMERICAN rillLOSOPIIICAL SOCIETY ; 
UONORARY FELLOW OF TIIK ROYAL SOCIETY OF EDINBURGH; 
LAIK UIHRCTOli OK THE NATURAL HISTORY DEPARTMENTS OK THE BRITISH MUSEUM; LATE PRESIDENT OF THE 
BRITISH ASSOCIATION FOR TUK ADVANCEMENT OK SCIENCE; LATK KULI.KIllAN PROKESBOK OK 
PHYSIOLOGY IN TIIK ROYAL INSTITUTION OK GREAT BRITAIN . 
LATB MNACRR PROKESBOK OK COMPARATIVE ANATOMY AND FELLOW OF MERTON CO LLRG R , OX FO R D ; 
RMBRITU8 PBOFBSSOK OF ZOOLOGY AM) COMPARATIVE ANATOMY IN UNIVERSITY COLLEGE. UNIVERSITY OF LONDON. 
FELLOW OF TRINITY COLLEGE, CAMDUIUGE. AND PROFESSOR OF ZOOLOGY IN TUE I M PE R I A L COLLEGE OF 
EDITED BY 
WITH THE CO-OPEHATION OF 
ADAM SEDGWICK, 
SCIENCE AND TECHNOLOGY, LONDON. 
BRYBK PROFEBSOK OF ZOOLOGY IN THE UNIVERSITY OF MANCHESTER; 
AND 
PRUFES80R OF PROTOZOOLOGY IN TUB UNIVERSITY OK LONDON. 
VOLUME 54. — New Series. 
?Dlifb ^’itbograpbit anb ®e*t-Jfigures. 
V 
LONDON; 
J. & A. CHURCIiLLL, 7, GREAT’ MARLBOROUGH STREET, 
1910. 
