X 



GENETIC CYCLE IN ORGANIC^ 



NATURE; 



OR, THE SUCCESSION OP FORMS IN THE 

 PROPAGATION OF PLANTS AND ANIMALS. 



BY GEORGE OGILVIE, M.D., 



REGIUS PROFESSOR OF THE INSTITUTES OF MEDICINE IN THE UNIVERSITY OF 



ABERDEEN ; AUTHOR OF THE *' MASTER BUILDER'S PLAN 



IN THE TYPICAL FORMS OF ANIMALS." 



ABERDEEN : A. BROT 



EDINBURGH: JOHN MENZIES. 

 LONDON : LONGMHr^N & CO. 



MDCCCLXI. 



