DESCRIPTION OF SPECIES. 57 



teeth and the absence of a basilar marginal veinlet, which is well marked 

 in both specimens of the Dakota Group. 



Habitat: Ten miles northeast of Delphos, Kansas. No. 4017 of the 

 collection of Mr. R. D. Lacoe. 



QuERCus (Dryophyllum) Hosiana, sp.nov. 

 PI. Ill, Fig. 14. 



Leaf coriaceous, small, ovate or short ovate-lanceolate, pointed, rounded 

 and narrowed at base, somewliat inequilateral, unequally dentate-rejiand on 

 the borders, entire toward the hase; primary nerve strong; secondaries, 

 of which there are six pairs, at an angle of divergence of 50° to G0°, arched 

 in passing toward the borders, subcraspedodrome or entering the teeth by 

 short branches of the secondaries. 



This leaf is like the ujiper part of some of the numerous leaves of Q. 

 wesifalica, figured in Hosius, Fl. Westfal. Kreidef, p. 161, Pis. xxix and xxx, 

 the only difference being in the very reduced length of the leaf, which, 

 with that exception, has all the characters described by the author. As seen 

 in the figure, the secondaries pass under the teeth and are camptodi-ome, 

 while their branches enter them. This character is essentially considered 

 by Saporta as proper to the subdivision Dryophyllum of the genus Quercus. 



Habitat: Probably ten miles northeast of Delphos, Kansas. No. 4152a 

 of the collection of Mr. R. D. Lacoe. 



Quercus (Dryophyllum) rhamnoides, .sp.nov. 

 PI. XLVIII, Fig. 4. 



Leaves subcoriaceous, ol^long-lanceolate, rounded in narrowing io the 

 base, l)lunt or obtuse at a])ex ; borders entire or slightly undulate; midrib 

 comparatively narrow, straight, half round; secondaries numerous, parallel 

 and equidistant, a little curved in passing toward the borders, camptodrome, 

 incundjent in festoons quite near the borders; tertiaries strong, at riglit angles 

 or slightly ol)lique to the secondaries, numerous, rarely simple, mostly 

 forking at the middle, comjjosing- by sulidivisions an irregular, small, (juad- 

 rate areolation. 



The leaves representing the species are somewhat lacerated, the best 

 preserved being 7""" long, 4'™ broad at the middle, and has sixteen pairs of 

 narrow, thin secondaries, deeplv marked, mostly simple, diverging from the 

 midrib at an angle of 40^^, united by nervilles close and at right angles. 



The species has a near atfinit)- of character to Drifoplii/IliiDi Eodrys, 



