86 

 Proteoides acuta, Heer, PI. xv, Fig. 3 ; PI. xxviii, Fig. 13. 



Leaves coriaceous, linear-lanceolate, narrowed to the base, and gradually tapering upward to a 

 slightly scythe-shaped point ; borders undulate ; medial nerve broader ; secondary veins invisible. 



Proteoides acuta, Heer, Phyllites, p. 17, PI. iv, Figs. 7-8; Lesqx., American 

 Journal of Science and Arts, he. cit., p. 99 ; Transactions of the American 

 Philosophical Society, vol. xiii, p. 431, PI. xxiii, Figs. 5-7. 



The fragments figured by the author indicate much smaller leaves than 

 ours ; they do not show the undulation of the borders, as remarked upon the 

 numerous specimens which I have examined ; the only character which indi- 

 cates the identity of these leaves with those of Heer is the total absence of 

 secondary veins. These leaves appear about of the same size as those of the 

 former species, but somewhat narrower toward the base ; their surface is not 

 polished ; the medial nerve is thicker, and the borders undulate. The lower 

 part of the leaf (Fig. 5 in Transactions) is somewhat decurrent to the 

 enlarged base of the medial nerve, as it is generally in a sessile leaf ; the same 

 character is remarked in our PI. xv, Fig. 3 ; the fragment, (Fig. 13 of PI. 

 xxviii,) like that represented, (Fig. 7 of the Proceedings,) indicates the size 

 of the leaves of this species as being as large as in the former, or from two 

 to three and a half centimeters wide. 



Habitat. — Fort Harker, Leconte ; near Decatur, Hayden. 



Proteoides greville^eformis, Heer, PI. xxviii, Fig. 12. 



Leaf coriaceous, small, enlarged above the base, linear- lanceolate, ilexuous ; borders entire; medial 

 nerve thick; secondary veins alternate, thin, aerodrome, ascending nearly parallel to the borders, and 

 curving slightly inward. 



Proteoides grcvilleaformis, Heer, Phillites, p. 17, PI. iv, Fig. 11 ; Lesqx., 

 Transactions of the American Philosophical Society, loc. cit, p. 432, PI. 

 xxiii, Fig. 8. 



The same uncertainty exists in regard to the identity of the species 

 described here with that of Heer, on account of the too fragmentary speci- 

 men represented in his Fig. 11. Our leaf is enlarged above the base still 

 more proportionally to the size than the leaves of P. acuta ; the nervation, 

 however, is as indicated by Heer. From the former species, it differs by its 

 very entire, not undulate border, and by the secondary veins more distinct 

 than in its two congeners. The point of the specimen is broken ; the upper 

 part of the leaf, however, appears very gradually narrowing upward in the 

 same way as in P. acuta, first curved to one side and then to the other, or 



