New Series, No. 212 (Vol. 58, Part 4). Price 10s, net. 
Subscription per volume (of 4 parts) 40s. net. 
JULY, 1909: 
THE. 
QUARTERLY JOURNAL 
| 
| 
MICROSCOPICAL SCIENCE. 
EDITED BY 
Sm RAY LANKESTER, K.C.B., M.A., D.Sc., LL.D., F.R.S., 
HONOKABRY FELLOW OF EXETER COLLEGE, OXFORD; CORRESPONDENT OF THE INSTITUTE OF FRANCE, 
AND OF THE IMPERIAL ACADEMY OF SCIENCES OF 8T. PETERSBURG, AND OF THE ACADEMY 
OF SCIENCES QF PHILADELPHIA, AND OF THE ROYAL ACADRMY OF SCIENCES 
OF TURIN; FOREIGN MEMBER OF THE ROYAL SOCIETY OF SCIENCES OF 
GOTTINGEN, AND OF THE RUYAL BOHEMIAN SOCIETY OF S8CIENCES, AND 
OF THE ACADEMY OF THE LINCEI OF ROMER, AND OF THE AMERICAN 
| ACADEMY OF ARTS AND SCIENCES OF BOSTON; ASSOCIATE OF THE 
ROYAL ACADEMY OF BELGIUM; HONORARY MEMBER OF THE 
NEW YORK ACADEMY OF SCIENCES, AND OF THR 
CAMBRIDGE PHILOSOPHICAL SOCIETY, AND OP 
THE ROYAL PHYSICAL SOCIETY OF EDIN- Es 
BURGH, AND OF THE 
BIOLOGICAL SOCIETY OF PARIS, AND OF THE CALIFORNIA ACADEMY OF SCIENCES OF SAN FRANCISCO, AND 
OF THE ROYAL ZOOLOGICAL AND MALACOLOGICAL SOCIETY OF BELGIUM}; 
CORRESPONDING MEMBER OF THE SENKENBERG ACADEMY OF FRANKFURT-A-M}3 
FOREIGN ASSOCIATE OF THE NATIONAL ACADEMY OF SCIENCES, U-S., AND MEMBER OF THE 
| AMERICAN PHILOSOPHICAL SOCIETY 3 
HONORARY FELLOW OF THE ROYAT SOCIETY OF EDINBURGH} 
LATE DIRECTOR OF THE NATURAL HISTORY DEPARTMENTS OF THE BRITISH MUSEUM; LATE PRESIDENT UF THE 
BRITISH ASSOCIATION FOR THE ADVANCEMENT OF SCIENCE; LATE FULLRRIAN PROFESSOR OF 
PHYSIOLOGY IN THR ROYAL INSTITUTION OF GREAT BRITAIN; 
LATE LINACRE PROFESSOR OF COMPARATIVE ANATOMY AND FELLOW OF MERTON COLLEGE, OXFORD; 
EMERITUS PROFESSOR OF ZOOLOGY AND COMPARATIVE ANATOMY IN UNIVERSITY COLLEGE, UNIVERSITY OF LONDON. 
WITH THE CO-OPERATION OF 
ADAM SEDGWICK, M.A., F.RS., 
PROFESSOR OF ZOOLOGY AND COMPARATIVE ANATOMY IN THE UNIVERSITY OF CAMBRIDGE 
SYDNEY J. HICKSON, M.A., F.RS., 
BEYER PROFESSOR OF ZOOLOGY IN THE UNIVERSITY OF MANCHESTER, 
AND 
KE. A. MINCHIN, M.A., 
PROFESSOR OF PROTOZOOLOGY IN THE UNIVERSITY OF LONDON, 
WITH LITHOGRAPHIC PLATES AND TEXT-FIGURES. 
LONDON. 
J. & A. CHURCHILL, 7 GREAT MARLBOROUGH STREET. 
1909. 
Adlard and Son, Impr.,] (London and Dorking, 
