LESQUEKEFx.] ENUMEEATION OP CRETACEOUS PLANTS. 353 



nervation, is of the same species as that of Plate XI, fig. 3, whose sur- 

 face is deeply cut by broad nerves and secondary veins, lu this form, 

 the secondary veins are sometimes all craspedodrorae, sometimes mixed. 



CiSSITES ACUMINATUS, Sp. nOV., PI. VIII, fig. 1. 



Leaf deltoid from the middle to the acuminate point, rounded and sub- 

 truncate to the petiole, subtrilobate, entire coriaceous; nervation trifidfrom 

 the base. 



This fine leaf, tliough of the same type as those described under the 

 two former specific divisions, differs evidently by its form, its entire 

 borders, and its secondary veins parallel, close to each other, all campto- 

 drome. It is about eight centimeters long without the petiole, wliich 

 was apparently long and slender; seven centimeters broad between the 

 two points of the primary lateral nerves, where it is enlarged into a 

 slightly marked acute lobe, and wherefrom it is broadly deltoid to the 

 acuminate point. Comparing it to the fine small leaf of Sassafras 

 JUudfjei in Cret. Flora, PI. XXX, fig. 7, we easily recognize a likeness 

 of characters in the form aud the nervation, which proves also the rela- 

 tion of this Cissites to the Sassafras or the Araliacece. 



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



Cissites Heerii, sp. nov. PL VI, fig. 3. 



Leaf fan-shaped in otitline, rounded and cuneate to the base, enlarged 

 above the middle, divided in the upper part into five acute nearly equal lobes; 

 nervation trifid from above the base ; lower secondary veins ascending to 

 tlie point of the intermediate lobes, the others all camptodrome like their 

 divisions. 



The base of this leaf is destroyed; but its outline is clearly defined 

 by the border of the preserved part, and the direction of the lateral 

 primary vein. The leaf broadly cuneate toward the base, is slightly 

 contracted a little above, and hence is rounding to join the petiole ; the 

 two lateral primary nerves ascend to the point of a lower acute lobe, 

 as also the lower secondary veins, appearing, with the middle nerve, like 

 five branches of a five-lobed fan-like leaf. The lobes are equal, separated 

 by half rounded sinuses, and acutely pointed. Except that the two 

 lower secondary veins ascend to the points of two lobes, the nervation 

 is of the same type exactly as in the former species. The affinity of 

 these two leaves is therefore evident. It is, however, certain that this 

 one cannot be now compared to Sassafras (Araliopsis), nor to Aralia, 

 and it therefore authorizes the separation of this group, which by its 

 characters, seen in this last species, is allied to the Ampelidecu, espe- 

 cially to Cissus. 



Habitat. — Xear Fort Harker, Kansas, Chs. Sternberg. 



Cissites cyclophylla, Lesqx. 



PopulUes cyclophylla?, Heer,— Cret. Flora, p. 59, PI,' IV, fig. 5, and PL XXIV, fig. 4. 



Leaves round, entire, stib coriaceous, tvith slightly undulate borders, round 



or truncate to the long slender petiole; nervation subtrifid or pinnate from 



the base; lateral veins straight to the borders, craspedodrome, the lotcest 



branching. 



I am not positive in regard to the specific identity of the two leaves 

 referred to this species. Fig. 5 of PL IV has the veins on a more acute 

 angle of divergence, it being less enlarged on the sides ; fig. 4 of PL 

 XXIV, has under the lower pair of lateral nerves a thick marginal vein 

 in right angle to the mid-rib; in both, however, the veins and their divis- 

 ions enter the borders, and the nervilles, which join them in right 

 23 H 



