DESCRIPTION OF SPECIES. 59 



face. These galls, of which there are four specimens, vary in size from that 

 of a pea to that of a large walnut ; they are all perfeetl)' glol)ular, very 

 smooth, shining, of black color, easily detached from the coarse, red matter 

 which contains them, and marked with a smooth cicatrice like tlie point of 

 attaduneut and a few irregular, round perforations like those made upon 

 (»ak galls by the egress of the insects. 



Habitat: Found all together at the same locality, Ellsworth County, 

 Kansas; A. Wellington, collector. No. 5 of the collection of the museum 

 of the University of Kansas. 



Tribe BETULE^E. 



Alnites grandifolius Newb. 



Later Ext. Fl., p. 9; Illust. Cret. and Tert. PL, PI. iv, Fig. 2. 



Betula Beatriciana Lesq. 

 PI. Ill, Fig. 16. 



Cret. Fl,, p. Gl, PI. v. Fig. 5 ; PI. ixx, Fig. 4. 



A fragment, the upper part of a leaf, apparently referable to this species, 

 which as yet is not sutliciently known. 



Haliitat: Ellsworth County, Kansas. No. .518 of the collection of tlie 

 museum of the University of Kansas ; E. P. West, collector. 



BETULITES Heer. 



Tliis generic division has been already used by Heer for the description 

 of two fragmentary leaves of the Dakota Group (Bctulites dentJcitlatKS Heer, 

 Phyll. Cret. du Ndbr., p. 15, PI. iv. Figs. 5, G). I refer to it now a large 

 number of leaves, remarkably well preserved in ferruginous concretions, 

 mostly obtained by Judge West in the Dakota Group of Kansas. All these 

 leaves show, far more distinctly than those described by Heer, a relation to 

 Betula. 



First. By the form and size of the leaves, which are ovate, blunt-]jointed 

 or oblong-obtuse, round, reniform, truncate, subcordate or broadly cuneate 

 at the entire marginal Ijase, which terminates in the lowest teeth of the 

 borders; all forms identical with those of tlie leaves of the common B. nigra L. 



Second. By the nervation, which is regularly pinnate, the median nerve 

 straight and narrow, the secondaries oblique, equidistant and |)arallel, 

 passing straight to tlie borders, craspedodi'ome, the lowest pairs generally 



