DESCRIPTION OF THE SPECIES. 249 



ARAUCARIA Juss. 



Leaves sometimes thickened or coriaceous, four-sided, falcate, incurved, 

 keeled on tlie back and sometimes flattened, possessino; several nerves, 

 acute at the apex or mucronate, inserted by a narrowed and twisted base 

 and decurrent, spirally inserted, or generally distichous on the lateral 

 branches and branchlets. 



The above description by Saporta' gives the character of the two 

 types of the leaves of Araucaria. The kind of leaves given in the latter 

 part of the description is that of certain forms found in the Potomac flora, 

 and I have placed these provisionally in this genus. 



Araucaria podoc.\kpoii es, sp. no v. 



Plate LXXXVI, Fi^'. 4. 



Stems comparatively stout; leaves small, oblong, elliptical, subacute, 

 narrowed to the base and apex, alternate, distichous, inserted by short 

 slightly twisted footstalks spirally on the stems, placed near the margins 

 and arranged in two rows in the same plane by the twisting of the foot- 

 stalks; nerves slender, indistinct, several in number, diverging at their 

 entrance into the leaf, then parallel to the summit, where they were not 

 distinctly seen. 



Locality: 72d mile-post, near Brooke, where it was found in only one 

 specimen. 



This plant has the appearance oi Podozamites, but the leaves are spi 

 rally arranged, and the nerves are not converging apparently at the sum- 

 mit. It is also like Nagciopsis, but the insertion of the leaves is different. 

 It is very much like Gardner's Podocarpus incerta, from the Eocene of 

 Bournemouth." 



Araucaria oijtusifolia, sp. nov. 



Plate LXXXV, Fi^'. !:!. 



Leaves spirally disposed, arranged in four (?) rows, flat, obtuse, widest 

 near the base, falcately curved upwards, decurrent and imbricated at base ; 

 nerves thin, parallel, several in number. 



'Pal. Fraiifaise, Vdg^taiix, vol. 3, 1878, pp. 412, 4U. 

 «Brit. Eoceue Flora, vol. 2, PI. XI, Fig8. 1-3. 



