PAM10NT0GRAPHICAL SOCIETY. 



VOLUME LXXIV. 



CONTAINING 



1. THE PALAEOZOIC ASTEROZOA. Part V. By Dr. W. K. Spencer. Four Plates. 



2. THE CARBONIFEROUS INSECTS. Part II. With Title-page and Index. By Mr. Herbert 



Bolton. Six Plates. 



3. THE PLEISTOCENE MAMMALIA.— HIPPOPOTAMUS. By Prof. S. H. Reynolds. Six 



Plates. 



ISSUED FOR 1920. 





LONDON: 

 PRINTED FOR THE PAL^EONTOGRAPHICAL SOCIETY. 



AGENTS FOR THE SOCIETY 



DULAU AND CO., LTD., 34-36, MARGARET STREET, CAVENDISH SQUARE W 1. 



JULY, 1922. 



