'Si HE SeSffiSsSm^ 



PAL^ONTOGRAPHICAL SOCIETY. 



VOL. IXXIII. 



THE PLIOCENE MOLLUSC A 



Vol. II, Part II. 



Pages 653—704; Plates LIII— LVI. 



ORDOYICIAN AND SILURIAN 

 BELLEROPHONTACEA. 



Part ir. 



Pages 49—92; Plates IX— XIII. 

 Title-page and Index. 



THE CARBONIFEROUS 



INSECTS. 



Part I. 

 Pages 1—80; Plates I— IV. 



Issued for 1919. 



