8 Bulletin 15 318 



The Oligocene material thus obtained has been studied and iden- 

 tified by the writer, kindl}' aided in cases of doubt by Dr. W. H. 

 Dall and Mr. Vaughan of the Smithsonian Institution. Many new 

 species in the coUedlion can at present be classed only generically 

 since similar specimens are in the Smithsonian collecftion awaiting 

 description by Dr. Dall. A few new species not in the latter col- 

 ledlion are described. 



A number of secflions and field notes made in 1900-1902 by 

 Professor Harris in northern Florida, in Georgia, Alabama and 

 Mississippi, illustrating Chattahoochee and Orbitoides limestones 

 atid Grand Gulf sandstones, have been placed by hirn at the 

 writer's disposal. 



The writer wishes to thank Professor Harris of Cornell, 

 Professor Stanislas-Meunier and Monsieur G. Ramond of the 

 Jardin des Plantes, Professor Fallot of the University of Bordeaux, 

 Professor Van den Broeck and Professor Rutot, Curators of the 

 Royal Museum at Brussels, for many courtesies and much prac- 

 tical help. 



