PLIOCENE; PISLLYPAMPA BOLIVIA 177 



narrower and longer, as well as older. It is quite probable 

 that this Pliocene Bolivian species marks a stage in the with- 

 drawal of the genus from the Pacific coast of South America 

 which was brought about by the elevation of the mountains 

 in the late Tertiary. 



The existing species of Pilocarpus number about fifteen, 

 and are small trees or shrubs, largely confined to the eastern 

 provinces of Brazil, although one species reaches northward 

 as far as Cuba, another to Colombia and a third extends 

 southward as far as Uruguay. A fourth is present in the 

 Brazilian provinces of Matto Grosso and Cujaba. How far 

 toward the headwaters of the Amazon the genus may be 

 represented at the present time is not known. 



Family BURSERACE^ 



Genus PROTIUM Burm. 



Protium fossilium Berry, sp. nov. 



PLATE VII Fig. 5 



Leaflets medium sized, ovate in general outline, widest be- 

 low the middle, tapering upward and acuminate tipped. Base 

 abruptly cuneate-rounded, slightly decurrent. Margins en- 

 tire, obviously, but not markedly indulate. Texture sub- 

 coriaceous. Length about 10 cm. Maximum width about 

 2.5 cm. These leaflets are distinctly inequilateral, especially 

 proximad the outer basal margin being twice as far from 

 the midrib as the inner, and rounded although the latter is 

 almost straight. Petiolule wanting. Midrib thin, prominent, 

 straight. Secondaries well marked, numerous, at regular 

 intervals and subparallel except in the constricted base on 

 the inner (upper) side of the lamina; they diverge from the 

 midrib at wide angles, and are camptodrome in the marginal 

 region. 



The present specimen is obviously the leaflet of a com- 

 pound leaf and I have compared it with various Legumin- 

 OS36, Simarubaceae, Sapindacese, Meliaceae, etc., families likely 



