334 GEOLOGICAL SURVEY OF THE TEERITORIES. 



Gleichenta Kureiana, Heer., Cret. Flor., p. 47, PI. I, Figs 5-5«. 



Frond pinnate ^ pinnwlong, linear, pinnately equally lobed ; lobes nearly 

 «y,t right angle to the rachis separated to near the base ; medial nerve thiclc, 

 piwiately branching , veins forking at the middle. 



Gleichenia Nordenskioldi, Heer, Flor. Foss. Arct., p. 50, Tab. IX, 

 figs. 6-12.— PI. II, fig. 5. 



Frond slender dichotomoiis, bi-polypinnate ; ultimate pinnw alternate^ 

 rigid, open, linear, parallel; leaflets free, oblong obtuse, rounded at their 

 base, inclined upward, coriaceous; secondary veins feiv, three or four pairs, 

 the lotver forJcing, the upper simple. 



This species is very distinct from the former, and the differences in 

 the characters easily seen even in our fragmentary specimens. In the 

 one figured here, the pinnules are separated to their base, and not mere 

 lobes as in the former ; they are turned upward, and by the upper basilar 

 border they comi^ress the rachis, which becomes evidently flexuous, in 

 our specimen, at least ; the veins, also, are more distant, or less divided. 

 The fructifications of this fine fern are marked upon the specimens of 

 Greenland by two large round sori on each side of the middle nerve, 

 near the base of the leaflets. There is no difference whatever in any 

 of the characters of the Kansas specimen with those of the Greenland 

 form. Even the undulation of the primary rachis distinctly remarked 

 in Tab. IX, fig. 7, of Heer's flora, is equally distinct in the primary 

 rachis of the fragment figured here. This species has been observed on 

 specimens from the Lower Cretaceous of Greenland only, wherelrom 

 Professor Heer has described thirteen species of Gleichenia, while only 

 two were found in the specimens of the Upper Cretaceous of the same 

 country. 



Habitat. — Near Fort Barker, Kansas, Chs. Sternberg. 



ph^:n^ogamous. 



CYCADE^. 



Pterophyllum (?) Haydenii, Lesqx., Cret. Flor., p. 49, PI. I, fig. 6, Q'^. 



Frond linear, simply pinnate ; rachis rugose, half an inch broad or more, 

 marked by circular dots in vertical roios, and regularly placed about half a 

 centimeter distant, apparently scars of the points of attachment of the 

 pinnce; pinnce (or leaves) entire, oblong, oval-obtuse, slightly arched on 

 the lotcer side, flat, attemiated at the round point of connection to the 

 rachis, regularly and narrowly striated lengthwise. 



Of this peculiar organism, no other part has been discovered exce-pt 

 the fragment figured. Professor Heer regards it as unreferable to the 

 Gycadece, on account of extraordinary broad stem, and supposes tbat it 

 should rather be considered as a Conifer, of the section of the 

 Araucarites. This opinion seems confirmed by the presence upon the 

 same specimens of the cone described here below as Abietites Frnestinw, 

 both cone and branch being originally described as representing a 

 same species related to Pterophyllum Ernestince of Stiehler, described 

 from similar fragments in the Paleontographica. 



CONIFERS. 



Abietites Ernestine, Lesqx., Cret. Flor., PL I, fig. 7. 



Cone oblong, abruptly narroiced to a short pedicel, scales broad, truncate, 

 appressed and imbricated. 



