General Editors: P. GILES, Litt. BD Master of Tienes 
College, and A. C. SEWARD, M. A. F.R.S., Professor of 
Botany in the University of Cambridge ; 
PRICE 1s NET 

bound in cloth; in lambskin 2s 6d net 
The following volumes, among others, have already been 
published :— 
Spiders. By C. Warsurton, M.A. 
Earthworms and their Allies. By Frank E. 
Brepparp, F.R.S. ; 
Primitive Animals. By Grorrrey SMrru, M.A. 
Plant=Animals: a Study in Symbiosis. By 
Professor F. W. Krxzsuez, Sc.D. 
The Migration of Birds. By T. A. Cowarp. 
Life in the Sea. By James Jounstong, B.Sc. 
Plant=-Life on Land. By Professor F. O. BowsEr, 
se.D.; PRS. 
Links with the Past in the Plant World. 
By Professor A. C. Shwarp, F.R.S. 
Prehistoric Man. By W. L. H. Ducxworts, 
MEAs, NED: Se2D: 
_ The Wanderings of Peoples. By Dr. A. C. 
Havpon, F.B.S. 
Heredity in the Light of Recent Research. 
By L. Doncaster, M.A. 
The Coming of Evolution. By Professor J. W. 
Jupp, O.B., F.R.S. 
An illustrated prospectus, giving full particulars of the serves, with 
a list of the volumes ready and in preparation, of which there are a 
very large number, will be sent post free on receipt of a post card 
addressed to Dept. Z at the address below. 
Cambridge University Press 
Fetter Lane, London, E.C. 
