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A TEXT-BOOK 

 OF ZOOLOGY 



BV 



T. JEFFERY PARKER, D.Sc, F.R.S. 



PROFESSOR OF IJIOI.OGV IN THE UNIVERSITY OF OTAGO, UUNEDIN, N.Z. 



AND 



WILLIAM A. HASWELL, M.A., D.Sc, F.R.S. 



PROFESSOR OF P.IOLOGY IX THE UNIVERSITY OF SYDNEY, N.S.W. 



WITH ILLlTS']"RATIONS 



MACMILLAN AND CO., LIMITED 

 ST. MARTIN'S STREET, LONDON 



1910 



