328 



ANNUAL KEPORT SMITHSONIAN INSTITUTION, 1913. 



especially toward the close of the Oligocene and the dawn of the 

 Miocene, Saporta stating that the slabs from the leaf beds at Armis- 

 san in southeastern France are thickly strewn with their peculiar 

 fruits. Fossil forms continue in Europe throughout the Miocene 



and Pliocene, and specimens of late Miocene or early Pliocene age 

 are recorded fi'om Spain, France, Italy, Croatia, and Hungary. 



The only described species from America occurs somewhat earlier 

 than any of the European forms, being found in the lower Eocene 



