ART. 22 TEETIABY FOSSIL PL-4NTS FROM ARGENTINA BERRY 13 



Although both belong to the Colymbea section of the genus, it 

 differs from Araucaria araucoensis Berry ^^ in its much laro'er and 

 inferentially more crowded leaves, which also differ in outline and 

 in the width at the basal flexure. 



Araucaria iniponens described by Dusen ^* from the Tertiary of 

 Seymour Island, Antarctica, has much the general form of the larger 

 leaves from Rio Negro Territory with a wide base, but is more dis- 

 tinctly lanceolate and has fewer veins — not very constant or im- 

 portant features. Its describer considers the Antarctic species to 

 be closer to Arwucaria brasiliana than to Araucaria irnbricata; but 

 as it is represented by very meager material, there is little basis 

 for an opinion. 



Occurrence. — Four km. west southwest of Bernal, about 12 miles 

 southeast of Barriloche, Territory of Rio Negro. 



Plesiotypes.—Q^t, No. 37858, U. S. N. M. 



Order FINALES 



Family CUPRESSINACEAE 



Genus FITZROYA Hooker f. 



FITZROYA TERTIARIA, new species 



Plate 2, Figures 2-4 



Leafy twigs, slender, branching; covered with ovate, pointed, 

 appressed, imbricated leaves, with broadly decurrent bases. The 

 phyllotaxy can not be determined, but as the leaf points usually 

 rise to different levels the effect is of a spiral phyllotaxis, what- 

 ever the arrangement at their insertion may have been. {F. pata- 

 gonica is said to have the leaves in alternate trimerous whorls.) 

 These leaves are flat or convex with the contour of the twigs and 

 not keeled; some are slightly divergent, and perhaps a majority 

 have recurved tips, but the habit is much more appressed than in 

 the single specimen of Fitzroya patagonica that has been available 

 for comparison. In some fragments where the plant substance is 

 preserved it is seen to be coriaceous and shows traces of a wide 

 but not prominent midvein as in the recent species. 



Although only sterile twigs have been seen and no microscopial 

 preparations have been made there is little doubt but that these 



" Berry, Edward W., Johns Hopkins Studies in Geology, No. 4, p. 122, pi. 3, figs. 1-4, 

 1922. 



"Dus4n, P., Wiss. Ergeb. Schwed. Sudpolar-Exped. 1901-1903, vol. 3, Lief. 3, p. 11, 



pi. 1, figs. 16, 17, 1908. 



