Sir RAY LANKESTER
K.C.B., F.R.S.
WITH 34 ILLUSTRATIONS
METHUEN & CO. LTD.
36 ESSEX STREET, W.C.
LONDON
First Issued in this Cheap Form in 1920
Originally published by Messrs. Adlard & Son in 1913
First published by Methuen & Co. Ltd. 1914
Second Edition 1915
Third Edition 1920