90 



report;) far different, however, by its nervation. In regard to living species, 

 its affinity is with D. coceolobcefolia, Mart., of Brazil. 



Habitat. — Western Kansas, found in concretions by Professor Mudge. 

 These concretions appear rich in leaves, which have not been preserved, or, 

 at least, have not been found yet in the arenaceous shale of the group. 



Bumelia marcouana, (Heer,) Lesqx., PI. xxviii, Fig. 2. 



Leaf membranaceous, broadly oval, entire, eniarginate, rounded downward to a long, slender petiolo, 

 penniuerve. 



Leguminosites marcouanus, Heer, Dana's Manual of Geology, Ed. II, p. 459, 



Fig. 827. 



Leaf 5 centimeters long from the top of the slender 2^-centimetcr-long 

 petiole, more than 4i centimeters broad, very entire ; with seven pairs of 

 secondary veins, parallel, on a broad angle of divergence of 60° to 70°, passing 

 up to near the borders, where a few of them branch once, and all become 

 effaced. These veins are mostly opposite, the lower pair joining the middle 

 nerve a little above the borders ; this, with the second and third pairs, are 

 closer to each other, 4 millimeters in distance, while the upper pairs are 

 more distant, 6 to 9 millimeters, all straight or slightly curved. The notch is 

 marked by two straight lines, which, however, are smooth like a continuation 

 of the borders, and not as resulting from erosion. The leaf is so very similar 

 in form, size, and nervation, also, to those of our present Rims cotinus, which 

 also are sometimes notched, that a relation to this last genus could be sup- 

 posed. The absence of any trace of areolation prevents a close comparison. 

 The notch is, however, deeper and more marked than in any of the leaves of 

 R. cotinus. This leaf is evidently identical to that figured in Dana's Manual, 

 (loc. cit.) The long, slender petiole of this leaf prevents its reference to 

 Leguminosites. 



Habitat. — Minnesota, James Hall ; two fragments, one with the petiole; 

 Nebraska, Marcou ; a fragment without petiole. 



POLYPETALJE. 



Umbellijtorce. 

 Aralia quinquepartita, Lesqx., PI. xv, Fig. 6. 



Leaves membranaceous, three-nerved from above the base, five-lobed by tbe forking of the primary 

 nerves; lobes oblong, somewhat narrowed downward, entire or undulate ; base of tho leaf cuneiform. 



Aralia quinquepartita, Lesqx., Hayden's Report, 1871, p. 302. 



This leaf is represented by a single specimen, representing a leaf of a thick- 



