THE 



GENETIC CYCLE IN ORGANIC 

 NATURE; 



OR, THE SUCCESSION OF FORMS IN THE 

 PROPAGATION OF PLANTS AND ANIMALS. 



BY GEORGE OGILVIE, M.D., 



REGIUS PROFESSOR OF THE INSTITUTES OF MEDICINE IN THE UNIVERSITY OK 



ABERDEEN ; AUTHOR OF THE " MASTER BUILDER'S PLAN 



IN THE TYPICAL FORMS OF ANIMALS." 



ABERDEEN : A. BROWN & CO. 



EDINBURGH: JOHN MENZIES. 

 LONDON : LONGMAN & CO. 



MDCCCLXI. 



