-f ROTOZOA/ 



By Marcus Hartoc;, M.A., Trinity College (D.Sc. 

 Lond.), Professor of Natural History in the Ouccn's 

 College, Cork 



PORIFERA (SPONGES) 



By Igerna B. J. SOLLAS, B.Sc. (Lond.), Lecturer on 

 Zoology at Nevvnham College, Cambridge 



COELENTERATA & CTENOPHORA 



By S. J. HiCKSON, M.A., F.R.S., formerly Fellow and 

 now Honorary Fellow of Downing College, Cambridge ; 

 Beyer Professor of Zoology in the Victoria University of 

 Manchester 



EGHINODERMATA 



B>' E. W. MacBride, M.A., F.R.S., formerly Fellow of 

 St. John's College, Cambridge ; Professor of Zoology in 

 McGiir University, Montreal 



iLoutioH 

 MA CM ILL AX AND CO., Li.mited 



XKW YORK: THK .\I.\tMIIJ..\X COMl'A.W 

 I 906 



.'i U rights resoTted 



