" KNO W LEDGE " SERIES. 



LIFE AND ROCK: 



A COLLECTION OF ZOOLOGICAL AND 

 GEOLOGICAL ESSA YS. 



By R. LYDEKKER, B.A. Cantab., F.G.S., F.Z.S., 



AUTHOR OF I'HASES OF ANIMAL LIFE AND HOKNS AND HOOFS 



JOINT- AUTHOR OF " THE STUDY OF .MAMMALS " AND 



" A .MANUAL OF I'AL.HONTOLOGY " ; EDITOR AND 



CHIEF AUTHOR OF "THE ROYAL NATUKAL 



HISTORY'," ETC., ETC. 



\-UMMULITE. 



THE UXIVKRSAL PEESS, 326, IIIGK TIOLBOEN, W.C. 

 1894. 



