si ) DESCRIPTION OF SPECIES. 



Menispermites grand is, sp. nov. 



Plate XV, Figs, 1, 2. 



Leaves subcoriaceous, large, flat, nearly round, broader than loug, peltate ; bor- 

 ders entire or undulate; nerves radiating from the point of attachment, camptodrome; 

 primary nerves five. 



This species differs from the preceding not only by the large size of 

 the leaves but especially by the nervation which is simply camptodrome, 

 the veins and their divisions curving along close to the borders and anas- 

 tomosing in a single row of festoons. Even the medial nerve has the 

 same character and does not ascend to the borders, but is forked near the 

 apex in camptodrome divisions. 



Hub. — Near Clay Centre, Kansas. H. C. Towner. 



Menispermites oval is, Lesqx. 

 Plate XV, Fig. 5. 

 Hayden's " Ann. Hep.," 1874, p. 357, pi. v, fig. 4. 



Leaf narrowly oval or oblong, obtusely pointed, rounded at base, palinately five- 

 nerved ; lateral nerves at an acute angle of divergence, the inner ones ascending to 

 near the top, branching outside; branches numerous, parallel, curving along the bor- 

 ders in festoons. 



This fine leaf, preserved nearly entire, is 7 to 8 centimeters long, 3i 

 centimeters broad, nearly exactly oval-oblong, perfectly entire. It is less 

 distinctly palmately five-nerved than the leaves of the other species of this 

 genus; the two internal primary nerves are as strong as the medial one, 

 curve gradually nearly parallel to the borders, and near the top join the 

 branches of the midrib with which they anastomose in curves; the outside 

 lateral nerves are thinner and shorter; they ascend also nearly parallel to 

 the borders, disappearing in the middle of the leaf in anastomosing with 

 branches of the lateral primary nerves. This is a mere deviation from 

 the type. 



Under the name of Haphnogene Kami, Heer has published (" Fl. Arct.," 

 i. p. 112, pi. xiv), from the Miocene of Greenland, leaves related by their 

 form to this Cretaceous species. The same kind of leaves are described by 

 Saporta and Marion in the "Flora of Gelinden," p. 63, pi. x, as Cocculus 

 Kami. In these leaves the primary nervation is in three from the base; 

 in the Cretaceous leaf it is positively in five and therefore different, 

 appearing intermediate between that of the leaves described above as 

 Menispermites and that of Daphnogene, or Cocculus Kami. 



Rob. — Near Clay Centre, Kansas. 



