78 DESCRIPTION OF SPECIES. 



p. 25, pi. x, figs. 1-6. The relation of this leaf to this genus is as evident 

 as it can be indicated by a single specimen representing only part of a leaf 

 and no fruit. 



ffab. — Near Glasco, Kansas. Cks. Sternberg. No. 414 of the collection 

 of the Museum of Comp. Zool., Cambridge. 



MENISPERMACE^E. 



MENISPERMITES, Lesqx. 

 " U. S. Geol. Rep.," vi, p. 94. 



The definition of this genus has to be somewhat modified in this: 

 the leaves are not only broadly deltoid and more or less distinctly tri- 

 lobate, but also round or ovate, entire, with a camptodrome nervation. 

 From this, the group is subdivided in two sections, represented one by 

 lobate, the other by entire leaves. 



M e n isper mites obtusilobus, Lesqx. 



Plate XV, Fig. 4. 



"U. S. Geol. Rep.," vi, p. 94, pi. xxv, figs. 1,2; xxvi,fig.3. 

 if. obtusilolus var., ibid., p. 95, pi. xxii, fig. 1. 



Menisper mites Saline n sis, Lesqx. 



" U. S. Geol. Rep.," vi, p. 95, pi. xx, figs. 2, 3. 



Me n is per mites acutilobus, sp. nov. 



Plate XIV, Fig. 2. 



Leaf large, triangular in outline, broadly rounded or nearly truncate at base r 

 deltoid, dentate-lobate, five-nerved from near the base, coriaceous; nerves more or less 

 branching on the lower side, eraspedodrome, with their divisions; nervilles at right 

 angles to the nerves, anastomosing iu the middle of the areas. 



The specimen figured is the only one seen. Comparison of the figures 



representing this species and If. obtusilolus, pi. xv, fig. 4, shows the close 



affinity of the leaves — If. acutilobus merely differing by the large acute 



distant teeth of the borders. The primary nervation is the same as that 



in pi. xv, fig. 1; the secondary veins are distant, equally oblique, and 



curving toward the borders, scarcely branching, all eraspedodrome, and 



entering the teeth of the borders, a character already remarked in all the 



specimens of If. obtusilobus, whose secondary veins are more generally 



