APh 



jU2 



New Series, No. 180 (Vol. 45, Part 4). 



MAECH, 1902. 



THE 



Price 10s. 



"\^^a.n 



QUARTERLY JOURNAL 



OF 



MICROSCOPICAL SCIENCE. 



EDITED BY 



E. RAY LANKESTEE, M.A., LL.D., P.R.S., 



M.EGE, 



KOKKIGN 



HONOBABV fKLtOW OF EXETER C 



AND or THE IMFKBIAI. ACAD 



OF SCIENCES OP PHII.A 



SOCIETV OF SCIESCES, AND OF THE I 

 AND 0» TUK AMERICAN ACADEMY O 

 ASSOCIATE OF THE BOYAI. 



ilBBSPONDENT OF TUE INSTITUTE OF FBANCE 

 ST. PETERSBUBG, AND OF THE ACADEMY 

 lEMBKB OF THE BOYAI. BOHEMIAN 

 EMY OF THE I.INCEI OF ROME; 

 TS AND SCIENCES OF BOSTON ; 

 DEMY OF BELGIUM; HONORARY MEMBER 



OF SClt 



YORK ACADEMY 

 ' CAMBBIDGE PHII.OSOFHICAI. SOCIETY, AND OF THE 

 PHYSICAL SOCIETY OF EDINBUBGH ; HONORAI 

 MEMBEB OF THE BIOLOGICAL SOCIETY 

 OF PABI«; 

 DIRECTOR OF THE NATURAL HISTOEY DEPABTMENTS OF TUE BRITISH 

 FBOFESSO ' ^ 



TUB 



tOYAI. 



J.M \ LATE FUt 

 PHYSIOLOGY IN THE ROYAL INSTITUTION OF GKEAT BBITAIN. 



WITH THE CO-OPERATION OF 



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



FELLOW AND TUTOR OF TRINITY COLLEGE, CAMBRIDGE; 



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



UNACBE PBOPESSOB <^^^^^lO....^..^^^^^^^^^^^^^^^^^ COLLEGE, OXFORD ; 



AND 



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



BEYER PBOFESSOB OF ZOOLOGY IN TUE OWENS COLLEGE, MANCHE3TEE. 



WITH LITHOGRAPHIC PLATES AND ENGRAVINGS ON WOOD. 



LONDON: 



J. & A. CHURCHILL, 7, GREAT MARLBOROUGH STREET. 



1902. 



Adlard and Son,] 



[Bartholomew Close. 



