New Series, No. 205 (Vol. 52, Part 1). Price 10s. net. 
Subscription per volume (of 4 parts) 40s. net. 
JANUARY, 1908. 
THE 
QUARTERLY JOURNAL 
OF 
MICROSCOPICAL SCIENCE. 
“EDITED BY 
Sir RAY LANKESTER, K.C.B., M.A., D.Sc., LL.D., F.B.S., 
HONOKARY FELLOW OF EXETER COLLEGE, OXFORD}; CORRESPONDENT OF THE INSTITUTE OF FRANCE, 
AND OF THE IMPERIAL ACADEMY OF SCIENCES OF ST. PETERSBURG, AND OF THE ACADKMY 
OF SCIENCES OF PHILADELPHIA, AND OF THE ROYAL ACADEMY OF SCIENCES 
OF TURIN; FOREIGN MEMBER OF THE ROYAL SOCIETY OF SCIENCES OF 
GOTTINGEN, AND OF THE ROYAL BOUEMIAN SOCIETY OF SCIENCES, AND 
OF THE ACADEMY OF THE IINCEI OF ROME, AND OF THK 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 THE 
CAMBKIDGE PHILOSOPHICAL SOCIETY, AND OF 
THE ROYAL PHYSICAL SOCIETY OF EDIN- 
BURGH, AND OF THE 
BIOLOGICAL SOCIETY OF PARI8, AND OF THE CALIFORNIA ACADEMY OF SCIENCES OF SAN FRANCISCO, AND 
OF THE ROYAL ZOOLOGICAL AND MALACOLOGICAL SOCIETY OF BELGIUM 5 
CORRESPONDING MEMBER OF THE SENKENBERG ACADEMY OF FRANKFURT-A-M; 
FOREIGN ASSOCIATE OF THE NATIONAL ACADEMY OF SCIENCES, U-S., AND MEMBER OF THE 
AMERICAN PHILOSOPHICAL SOCIETY 5 
HONORARY FELLOW OF THE ROYAL SOCIETY OF EDINBURGH; 
LATE DIRECTOR OF THE NATUKAL HISTORY DEPARTMENTS OF THE BRITISH MUSEUM, LATE PRESIDENT OF THE 
BRITISH ASSOCIATION FORK THE ADVANCEMENT OF SCIENCE; LATE FULLERIAN PROFESSOR OF 
PHYSIOLOGY IN THK ROYAT, INSTITUTION OF GREAT BRITAIN; 
LATE LINACRE PROFESSOR OF COMPARATIVE ANATOMY AND FELLOW OF MERTON COLLEGE, OXFORD. 
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.R:S., 
BEYER PROFESSOR OF ZOOLOGY IN THE UNIVERSITY OF MANCHESTER) 
AND 
E. A. MINCHIN, M.A., 
PROFESSOR OF PROTOZOOLOGY IN THE UNIVERSITY OF LONDON, 
WITH LITHOGRAPHIC PLATES AND TEXT-FIGURES. 
VY LUNDON: 
J. & A. CHURCHILL, 7 GREAT MARLBOROUGH STREET. 
1908. 
AES ea a ae rE SN SR ee EP ee ee ON 
Adlard and Son, Impr.,, | {London and Dorking. 
