294 FROCEEDINGH^ OF THE NATIONAL AIUSEUM. vol.55. 



pairs, approximately siibparallel and regularl}?^ spaced; they diverge 

 from the midrib at wide angles, becoming more ascending toward 

 the apex of the leaf, curve regularly upward and are camptodrome. 

 The Tertiary venation is fine l3ut exceedingly well marked, and con- 

 sists primarily of closely spaced and approximately straight percur- 

 rent nervilles. 



This species is exceedingly common in the collections from near 

 Tumbez, but because of the large size of the leaves they are usually 

 much broken, particularly the ends and margins. One of the most 

 perfect specimens is that shov/n in reduced size on plate 4. The Peru 

 material is much more abundant and complete than the type mate- 

 rial described by Engelhardt from Santa Ana, on the western margin 

 of the Rio Magdalena Valley in the Colombian Andes. The general 

 form and especially the venation are very characteristic, and there 

 can be no doubt but tliat the present material is identical with that 

 from Colombia. Regarding its botanical relationship, its reference 

 to the genus Condaminea is uncertain, nor are specimens of the latter 

 available for comparison. It suggests to me an entire leafed species 

 of Artocarpus. 



Engelhardt, who compared it with recent material in the German 

 herbaria, is confident that it is a Condaminea^ and writes that it is 

 most similar to Condaminea covyrribosa (Ruiz and Pavon) De Can- 

 clolle, a tall shrub of the Colombian and Peruvian Andes, a reduced 

 form of which is hardy at considerable elevations. The genus is a 

 small one in the existing flora and comprises tall shrubs and small 

 trees with corriaceous leaves, confined to the tropical Andean region, 

 and not otherwise known in the fossil state. 



Plcsiohjpe.—C^±. No. 35332, U.S.N.M. 



EXI'LANATION OF PLATES. 



Plate 14. 

 Fig. 1. Iriartites fumhezcnsis, new genus and new species, fragment two-tbirds 

 natural size. 

 2. Same enlarged to show details of venation. 



Plate 15. 

 Fin.]. Tnpirira lanceolaia Engelhardt. 



2. Styrax lanceolata Engelhardt (?). 



3. Mcspilodaphnc tnnibesensis Berry. 



4. Anona winsloiciana Berry. 



Plate 16. 

 Fi(!. 1. Banisteria incerta Berry. 



2. Ficus winslowiana Berry. 



3. Guatteria culebrensis Berry. 



Plate 17. 

 Fu!. 1. Condaminea grandifoUa Engellmrdt, three-fourths natural size. 



