Fossil, PLANTS OF JANCOCATA 217 



rounded distad and bluntly pointed at the base. Conspio 

 uously margined along one border and prominently marked 

 by forking and anastomosing cross veins. 



This form suggests a variety of genera of the leguminous 

 alliance, notably Lonchocarpus, Dalbergia and Copaifera, 

 and it may possibly represent one of these genera, since it is 

 more ligneous than is usual in Cassia. It is, however, sim- 

 ilar in appearance to the pods of certain existing species of 

 Cassia, and is also very close to numerous Tertiary pods 

 from the Chilean Miocene, the North American Eocene, and 

 Tertiary horizons elsewhere, which have been referred to 

 this genus. For this reason I refer it tentatively to that large 

 and diversified genus. 



There are two types of leguminous leaflets associated with 

 these pods at Jancocata, and it is quite possible that the pods 

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

 upon leaflets, but this cannot be determined. 



Cassia altocnsis constitutes a well marked type and is one 

 that is unlike anything at present known from the Pliocene 

 deposits at Corocoro or Potosi in Bolivia. This, however, 

 argues little, since a great variety of leguminous leaflets are 

 present at these two localities and fruits are very scarce and 

 represent but two leguminous forms. 



Genus C^SALPINIA Linne 

 C&salpinia jancocatana Berry, n. sp. 



PLATE I Figs. 5, 5a 



Leaflets ovate-elliptical in outline, markedly inequilateral; 

 with a broadly rounded, sessile base, and a somewhat nar- 

 rowed rounded tip. Margins entire, full and evenly rounded. 

 Texture sub-coriaceous. Length about 1.25 centimeters. 

 Maximum width about 8 millimeters. Midrib very stout, 

 conspicuously curved. Secondaries thin, about 7 pairs di- 

 verge from the midrib at wide angles and are camptodrome. 

 Tertiaries as shown in the accompanying enlarged drawing 

 (Fig. sa). 



