SEP J- 



New Series, No. 171 (Vol. 43, Part 3). 



1 ^^n '^^^^' ^^^^• 



Price 10s. 



THE 



QUARTERLY JOURNAL 



OF 



MICROSCOPICAL SCIENCE. 



KlUTKI) KY 



E. RAY LANKESTER, M.A., LL.D., F.R.S., 



' FELLOW Of EXK 



D OF THE IMPEUIA] 



OP SCIENCES OF 



SOCIETY OF S) 



rEK <,ULLEGE, OXFORD ; COB K ES PON D B N T OK 

 , ACAUEMY OF SCIKNCKS OF ST. PETEUSBUBG, 

 PIIILADELPHIA ; FOREIGN MEMBER OF THE 

 lENCES, AND OF THK ACADEMY OF THE LIN 



ASSOCIATE OF THE ROYAL ACADEMY OF BELGIUM; HONORA 



(IF THE NEW YORK ACADEMY OF SCIENCES, AND 



CAMBRIDGE PHILOSOPHICAL SOCIETY, AND OF THE R 



PHYSICAL SOCIETY OF EDINBURGH ; HONORAR 



MEMBER OF THE BIOLOGICAL SOCIETY 



OF PARIS ; 



ROYAL 



C E I OF 

 RY MEM 



OF THE 



\* S T I T U T E ( 

 ' THE ACAD 



BOHEMIANS 



ROME; 

 BER 



DIRECTOR OF THE 



I'-ULLERIAX PROFESS 



WITH THE CO-OPEIIATTON OF 



ADAM SEDGWICK, M.A., F.R.S., 



FELLOW AND TUTOK OF TRINITY COLLEGE, CAMBRIDGE; 



W. F. R. WELDON, M.A., F.R.S., 



,TOMY f 



AND 



SYDNEY J. HICKSON, M.A., F.R.S., 



BEYER PROFESSOR OF ZOOLOGY IN THE OWENS COLLEGE, M A N C H EST K R . 



WITH LITHOGRAPHIC PLATES AND ENGRAVINGS ON WOOD. 



^LONDON: 

 J. & A. CHCJRCHILL, 7, GREA.T MARLBOROUGH STREET. 



1900. 

 \ 



Adlftrd and Son,] 



[BRvthoIomeiv Close. 



