PUOCENE PlSLLYPAMPA BOLIVIA 163 



Order GLEICHENIALES 

 Family GLEICHENIACE^E 



Genus GLEICHENIA Smith 

 Gleichenia pectinata fossilia Berry, var. nov. 



PLATE VI Figs, i, 2 



I only succeeded in finding a single pinnule of this fern 

 and therefore can say nothing conclusive regarding the habit, 

 nor of its positive relationship with the existing and wide 

 ranging Gleichenia pectinata Presl X1 of South America. In 

 size, general form and venation the fossil pinnule is abso- 

 lutely identical with the pinnules of the existing species, as 

 may be seen in the accompanying figures. The pinnule is 

 17.5 mm. in length by 3 mm. in maximum width, entire mar- 

 gined, and bluntly pointed. The margins are slightly re- 

 volute, and the pinnule was borne at nearly right angles to 

 the rachis. The midvein is relatively very stout and prom- 

 inent, and curves upward slightly distad. It gives off 

 alternately about 20 to 22 well marked veins which imme- 

 diately fork once and then proceed straight to the margins. 

 Exact data relative to the geographical and altitudinal range 

 of the existing species are incomplete. I have collected it in 

 the Yungas region of Bolivia in the narrow moist valleys at 

 altitudes slightly over 7,000 feet and within 9 miles of the 

 iceclad peaks of the Cordillera Real. 



A ngiospermophyta 



Class MONOCOTYLEDONS 



Order SCITAMINALES 



Family MUSACES 



Genus HEUCONIA Linne 



Heliconia tertiaria Berry, sp. nov. 



PLATE III Fig. i 



Leaves of relatively small size, oblong in form, slightly 

 tapering to the acute tip, rounded truncate at the base, of a 



11 This variable species is now commonly referred to the genus 

 Dicranopteris Bernh . 



