NOTES AND LITERATURE 



SCIENTIFIC EXHIBITS AT THE SEVENTH INTERNA- 

 TIONAL ZOOLOGICAL CONGRESS 



From the 19th to the 24th of August, American scientists were 

 privileged to entertain the delegates and members of the International 

 Zoological Congress at the Harvard Medical School, in Boston. The 

 congress met in ten sections, and its program announced the titles 

 of three hundred papers. The scientific exhibits, which were of 

 unusual interest, are briefly described in the followino; para^n-apli.s. 



Paleontology.— Professor A. W. Grabau of Colunihia riiiversitv 

 exhibited five series of spirifers of the *S. mucro7uitm iy\x\ to show 

 the gradual evolution of five species along parallel lines. The most 

 primitive and oldest forms, from the middle Devonian (lower Ham- 

 ilton), are long-winged and flat. They gave rise to the five inde- 



