136 TUB FLOKA OF THE DAKOTA GKOUP. 



Abalia quinquepartita Lesq. 

 Cret. Fl., p. 90, PI. xv, Fig. 6. 



Aralia tenuinervis Lesq. 

 Cret. and Tert. Fl., p. G3, PI. vii, Fig. 4. 



Aralta radiata Lesq. 

 Cret. and Tert. FL, p. 64, PL vii, Figs. 2, 3. 



Aralia oonoreta Lesq. 



Haydeu's Ann. Kept., 1874, p. 349, Pi. iv, Figs, 2, 3, 4; Cret. and Tert. FL, p. 64, PL 



IX, Figs. 3-5. 



Order MYRTACE^. 



Tribe MYRTE^E. 



Myrtophyllum Warderi, sp. nov. 

 PL LTII, Fig. 10. 



A fragmentary leaf, subcoriaceous, with borders entire, gradually nar- 

 rowing towards the l)ase, there joining the base of the midrib, enlarged 

 into a broad, short petiole or decu.rring to it; secondaries oblique, proximate, 

 joined at apex to a margintd nerve following to the borders and undulate, 

 separated ])y simple, jiarallel tertiaries. 



Of this species there is only the fragment figured. It is part of a leaf 

 enlarging gradually upward from a short, tliick petiole; like a I'egular blade 

 broken 8""' from the base, where it is enlarged to 2""'. The secondaries are 

 oblique and straight, diverging 30° from the midi'ib, and are joined near 

 the borders to a marginal nerve and geiierall}'- separated by a single tertiary 

 which is parallel, shorter and not connected with the marginal nerve. The 

 nervation of the leaf is therefore comparable to that of some species of 

 Eucalyptus of New Holland; E. Jiorihniidd Endl. and E. acervula Sieb. are 

 l)oth represented in Ettingshausen's Blattskelete der Dicotyledonen, p. 203. 

 Myrtophyllum pulchrum Saporta (Monde des Plantes, p. 356, Fig. 113), has 

 leaves much like those of this Cretaceous species. Saporta compares its 

 leaves to those of M. Geinitzi Heer (Kreidefltn-a von Moletein, p. 22, PI. 

 XI, Figs. 2, 3). 



lLd)itat: Near Fort llarker, Kansas. No. 27.54 of the U. 8. National 

 Museum. 



