THE 



CYCLOPEDIA 







OF 



ANATOMY AND PHYSIOLOGY. 



EDITED BY 



ROBERT B. TODD, M.D. F.R.S. 



FELLOW OF THE ROYAL COLLEGE OF PHYSICIANS; 



PHYSICIAN TO KING'S COLLEGE HOSPITAL; AND FORMERLY 



PROFESSOR OF PHYSIOLOGY AND OF GENERAL AND MORBID ANATOMY IN KING'S COLLEGE, 



LONDON, ETC. ETC. 



VOL. IV. PART I, 

 PLE STA 



18471849 



LONDON 

 LONGMAN, BROWN, GREEN, LONGMANS, & ROBERTS. 



