TEEATISE ON ZOOLOGY 



EDITED BY 



E. KAY LANKESTEK 



M.A., LL.D., F.R.S. 



HONORARY FELLOW OF EXETER COLLEGE, OXFORD ; CORRESPONDENT OF THE INSTITUTE 



OF FRANCE ; DIRECTOR OF THE NATURAL HISTORY DEPARTMENTS 



OF THE BRITISH MUSEUM 



PART II 



THE PORIFERA AND COELENTEBA 



BY 



E. A. MINCHIN, M.A. 



PROFESSOR OF ZOOLOGY IN UNIVERSITY COLLEGE, LONDON 



G. HERBERT FOWLER, B.A., Ph.D. 



LATE ASSISTANT PROFESSOR OF ZOOLOGY IN UNIVERSITY COLLEGE, LONDON 

 AND 



GILBERT C. BOURNE, M.A, 



FELLOW AND TUTOR OF NEW COLLEGE, OXFORD 



WITH AN INTRODUCTION BY 

 E. RAY LANKESTER 



LONDON 



ADAM & CHAELES BLACK 

 1900 



