176 STUDIES IN GEOLOGY, No. 4 



Cassia palcana Berry, sp. nov. 



PLATE VI Fig. 11 



A single broken pod of what is apparently some species of 

 Cassia was collected at this locality and this may represent 

 the fruit of one or the other of the preceding species based 

 upon leaflets. This pod may be matched by those of num- 

 erous existing species in this same general region. It is 

 linear lanceolate in form, strongly compressed, prominently 

 margined, of resistant consistency, and prominently cross 

 veined. It was probably long stalked and presumably pen- 

 dulous, and is much like an unidentified existing species 

 which I collected in eastern Bolivia. Length about 7 cm. 

 Maximum width 12 mm. 



Order GERANIALES 



Family RUTACE^ 



Genus PILOCARPUS Vahl 



Pilocarpus bolivianus Berry, sp. nov. 



PLATE VI Figs. 9, 10 



The leaves in this genus may be reduced to one or two 

 leaflets but are prevailingly even pinnate. The present fossil 

 species was apparently of the last type. The leaflets are ellip- 

 tical in general outline, widest in the middle and rapidly 

 narrowing both distad and proximad to the equally pointed 

 apex and base. Margins entire, full and evenly rounded. Tex- 

 ture coriaceous. Length about 7 cm. Maximum width about 

 3.75 cm. Petiolule wanting. Midrib stout and prominent, 

 slightly curved. Secondaries stout and prominent, sub-parallel 

 and camptodrome ; 5 or 6 pairs diverge from the midrib at 

 angles of over 50 degrees, they are at first relatively straight 

 and then curve rapidly upward. The tertiaries are thin, but 

 well marked on the under side of the leaflet, forming an open, 

 prevailingly quadrangular areolation. 



Only a single other fossil species of Pilocarpus is known 

 and it comes from the lower Miocene of Coronel, Chile. It is 

 somewhat similar to this Bolivian species, but is relatively 



