22 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



v»l. 59. 



in the fruits of existing species of Iriartca, Astrocaryum, etc. Species 

 named in honor of T. Wayland Vaughan as a slight tribute of appre- 

 ciation of his work in the American tropics. 



The present species was first compared with the nuts of Astro- 

 caryum Meyer, a genus with numerous existing species ranging from 

 Mexico to southern Brazil, but in this genus the nuts are more 



Figs. 1-3, Iriartites vaughani 

 Berry. Gatun formation, 1} 

 miles northeast of gatxjn, 

 Canal Zone. 1,2, lateral views; 

 3, view from below, showing 

 large hilum. j nat. size. 



symmetrical and the three perforations are usually obvious. The 

 genus Iriartea of Ruiz and Pavon, whose fruits are very close to the 

 fossil, contains over a dozen, perhaps more, not very well understood 

 existing species, essentially South American but ranging from Costa 

 Rica southeastward through Colombia and the basins of the Orinoco 

 and Amazon and along the eastern lower slopes of the Andes to 

 Bolivia. 



Type.— Cat. No. 35621, U.S.N.M. 



