300 GEOLOGICAl. SrEYEY OF THE TEEEITOEIES. 



short swelling. The veiDS are very close to eacli other, closer than in 

 any species of fern, dichotomous in ascending from the medial nerve in 

 a very acute angle, their base being parallel to it before joining it. 



AXDE03IEDA PAELATOEH. Heer, (Phill. Cret. du Nebraska, p. 18, 

 PI. i, Fig. 5.) Neither in this work nor in my addition to the Fossil 

 Plants of the Mississippi. Joe. cit. has this species been figured in its 

 whole or with the point and the petiole. One specimen has an entire 

 leaf. It is narrowly lanceolate, gradually tapering to a long, acute, 

 slightly scythe-shaped point, and also gTadually tapering downward to 

 a short, broad, slightly winged petiole. The nervation is as figured by 

 Heer j the secondary veins emerging in an acute angle, thick, curving 

 upward, evanescing near the borders. 



Mag^'olia ALTEE^'A^'s, Heer. The upper half of a leaf about the 

 same part with same nervation as Heer's Fig. 3, of PI. iii. in Phyllites 

 du Nebraska. Apparently identical : nervation obsolete. 



22. Haed, Shalt, Feve-geatned, Whitish SA^'DSTO^^:. 



About of the same consistence and color as the specimens from Car- 

 bon Station. The precise locality is unknown, the labels having been 

 lost or forgotten. This is regrettable, on account of the i^eculiar charac- 

 ter of the remains of plants, mostly leaves of Ficus, which are preserved 

 in these shales. 



Cypeeus Chayaxesis, Heer. Many specimens representing leaves 

 of various size, as those of Fl. Ter. Helv., I, PI. xxviii. Fig. !«, with 

 cross-lines perpendicular to the nervation, as in Fig. 1//, and with astern 

 with broad strice of difierent color, as in Fig. 1 /*, of the same plate. 

 Some of the leaves have numerous marks of a small lungus, /S'. cJerotium, 

 which is like S.^ustuliferum^ Heer, (Fl. Ter. Helv., I. p. 21, PL ii, Fi<:j. 

 12 and 12h.) 



PopuLYS AECTiCA, Heer. It is the same form as that of PI. v, Fig. 

 3, of Fl. Arc, represented bv two specimens. •. 



Ficus 3II:ETI^-EEYIS, Heer, (Fl. Ter. Helv., II, p. 63.) With the form 

 of leaves as in PI. Ixxxi, Fig. 9, and secondary veins still more numer- 

 ous and also slightly more oblique than in Fig. G of the same plate. It 

 cannot be separated from this species. 



Ficus LA^'CEOLATA, Heer, {loc. cit., p. 62.) One large specimen is cov- 

 ered with numerous leaves of the same character as those figured in 

 Fl. Ter. Helv., Fig. 13, PI. clii. They much difier in appearance from 

 the following form, also represented by numerous leaves. 



Ficus aeenacea, sp. nov. Difters from the former species by broader 

 leaves of a thicker texture, not tapering, but somewhat rounded to the 

 petiole, by the medial nerve, twice as broad and grooved near the base. 

 The secondary veins are strong, but the ultimate reticulation is obsolete. 



Ficus Gaudi>'I, sj). iiov. A tine species, with broadly ovate-lanceolate 

 pointed leaves, (the point is destroyed.) rounded at the base to a short, 

 thick, curved petiole, varying in length from 3 to 7 inches, and propor- 

 tionally broad, from 1^ to 3^ inches; medial nerve thick and broad, 

 gTooved from the middle to the petiole; secondary veins nearly at a right 

 angle to the medial nerve, slightly more oblique in ascending to near 

 the point where the angle of divergence is still 60^, abruptly curving at 

 a distance from the borders. The base of the leaves is about as in the 

 living species Ficus Americana, Auct.; but no fossil species of this sec- 

 tion is comparable to it. The presence of so many leaves, types of the 

 section of a genus, forces the question of possible identity of those difter- 

 eut forms, distinct and sei^arable by what appears good specific charac- 



