palaeontogvapbical Society 1917- 



A MONOGRAPH 



OF THE 



BRITISH PALAEOZOIC 



ASTEROZOA 



BY 



W. K. SPENCER, M.A., D.Sc.(Oxon.), F.G.S. 



PART IV. 



Pages 169—196. 



LONDON: 

 PRINTED FOE THE PAL^ONTOGRAPHICAL SOCIETY. 



April, 1919. 



