28 THE FLORA OF THE DAKOTA GROUP. 



PODOZAMITES LANCEOLATUS (L. & H.) BrongU. 



PI. I, Figs. 5, 6. 



Heer, Fl. Foss. Arct,, vol. 4, pt. 1, PI. vii, Figs. l-7c, d; ibid., pt. 2, p. 106, PI. xxiii. 

 Figs. Ic, 4a, b, c; PI. xxvi, Figs. 2-10; PI. xxvii, Figs. 1-8. 



Zamia Imceolata L. & H., Foss. Fl. Gt. Brit., vol. 3, PI. cxciv. 

 Zamites lanceolatus Morr., Ann. & Mag. Nat. Hist., vol. 7, 1841, p. 116. 



Leaves distant, entire, narrowed at base into a short pedicel; lanceo- 

 late-acuminate, or linear-oblong, obtuse; nerves 14-30, generally 20-25; 

 dicliotomous above the base, thence simple, converging at the apex. 



The two fragments which we have of this species show entire agree- 

 ment Avith the description of it given by Heer from numerous well pre- 

 served sj^ecimens. The fragment (Fig. 5) corresponds to that in Heer^ (P. 

 lanceolatus, var. laiifollm), while Fig. 6 agrees with the one on the right of 

 Fig. 3 of the same plate. The first fragment has twenty-six nerves; the 

 second, which is nuich the narrower, has only twenty. 



Habitat: Elkhorn Creek, near Fort Harker, Kansas. Nos. 195 and 211 

 of the Museum of Comparative Zoology cf Cambridge, Massachusetts. 



Phyllites zami^fobmis, sp. nov. 

 PI. II, Fig. 7. 



Leaf somewhat falcate, linear-lanceolate, deeply marked lengthwise by 

 three strong distant stritB or ribs coming nearer together toward the point 

 of the leaf, the spaces between the striae being minutely lineate or nearly 

 smooth. 



The fragment is 12"™ long, Ijroken at the top and the base, l.S*"" broad 

 in the middle and gradually narrowed upward to the apex, being 4°"^ in 

 diameter at the point where it is broken. It has a degree of likeness to 

 leaves of Zamiea;, such as those of Podozamites aiif/iistifolius Eichw., but no 

 species of this genus has the stri;e so far distant and so thick. In this 

 particular it resembles the fragment of a stem figured by Heer as Equisetites 

 grcenlandicus^ from the Lower Cretaceous of Kome, but this fragment is that 

 of a stem, and though the ribs are at about the same distance and of the 

 same character and the space is obscurely striate as described by Heer for 

 his species, the fragment from Kansas is really that of a leaf, as shown by 

 the ribs becoming gradually more approximate toward the a^ex. It may be 



' Loc. cit., PI. XXVI, Fig. 6. 



»F1. Foss. Arct., vol. 3, pt. 2, p. 61, PI. xiii, Fig. 10. 



