flbalaeontograpbical Society 1916. 



A MONOGRAPH 



OF THE 



BRITISH PALAEOZOIC 



ASTEEOZOA 



BY 



W. K. SPENCER, M.A., F.G.S. 



PART III. 



Pages 109—168 ; Plates VI— XIII. 



LON DO N|: 



PRINTED FOE THE PALaEONTOGEAPHICAL SOCIETY. 



February, 1918. 



