A TREATISE ON ZOOLOGY 



Demy 8vo, Cloth, price 15s. net each; or in Paper 

 Covers, price 12s. 6d. net each. 



VOLUMES READY 



Part I. (First Fascicle) INTRODUCTION AND 

 PROTOZOA. By Sir RAY LANKESTER, K.C.B., F.R.S. ; 

 Prof. S. J. HICKSON, M.A., F.R.S. ; F. W. GAMBLE, 

 D.Sc., F.R.S. ; A. WILLEY, M. A., D.Sc., T.R.S. ; J. J. 

 LISTER, F.R.S. ; H. M. WOODCOCK, D.Sc. ; and the late 

 Prof. WELDOK. 



Part I. (Second Fascicle) INTRODUCTION AND 

 PROTOZOA. By J. B. FARMER, D.Sc., M.A., F.R.S. ; 

 J. J. LISTER, F.R.S. ; E. A. MINCHIN, M.A. ; and S. Jv 

 HICKSON, F.R.S. 



Part II. THE PORIFERA AND COELENTERA. 



By Sir RAY LANKESTER, K.C.B., F.R.S. ; E. A. MINCHIX, 

 M.A. ; G. HERBERT FOWLER, B.A., Ph.D. ; and GILBERT 

 C. BOURNE, M.A. 



Part III. THE ECHINODERMA. By F. A. BATHER, 

 M.A., assisted by J. W. GREGORY, D.Sc., and E. S. 

 GOODRICH, M.A. 



Part IV. THE PLATYHELMIA, THE MESOZOA, 

 and THE NEMERTINI. By Prof. BENHAM, D.Sc. 



Part V. MOLLUSCA. By Dr. PAUL PILSENEEH. 

 Part VII. CRUSTACEA. By W. T. CALMAX. 



Part IX. VERTEBRATA CRANIATA. By E. s. 



GOODRICH, F.R.S. 





