DESCRIPTION OK SPECIES. 51 



Fruiting catkin of Salix. 

 PI. VIII, Fig. 6. 



Salix species, a fruiting catkin, with small, somewhat distant pedicel- 

 late, cylindi-ical-ovate, pointed ovaries. This catkin is very similar to those 

 of a number of living species of willows, especially to those of S.frafjiUs 

 L. Among fossil organs of this kind it is comparable to Salix volkana 

 Ludw.^ It may be referable to S. protcccfoUa Lesq., the only species abun- 

 dantly distributed in the Dakota Group. 



Habitat: Ten miles northeast of Delphos, Kansas. No. 4062 of Mr. 

 R. D. Lacoe's collection. 



Order CUPULIFER^. 

 Tribe QUERCINE^E. 

 Fagus polyclada Lesq. 

 Cret. Fl., p. 67, PI. V, Fig. 6; Am. Jour. Sci. and Arts, vol. 46, 1868, p. 95. 



Fagus cretacea Newb. 

 Later Ext. Fl., p. 23 ; Illustr. Cret. and Tert. PL, PI. ii. Fig, 3. 



Fagus orbiculatum, sp. nov. 

 PI. XLVII, Fig. 6. 



Leaves small, rounded in the upper part, liroadly cuneate to the base, 

 entire ; midrib strong and straight, percuiTent ; secondaries simple, etpii- 

 distant, straight, craspedodrome ; nervilles thin, simple, distant, at right angles 

 to the secondaries. 



The leaf is remarkable by its simplicity and the n^gular disposition of 

 all its parts. It measures vertically 4.5"'" and is of a nearly orbicular form, 

 being only somewhat narrowed near the base. The secondaries (seven 

 pairs), diverging from the midrib at an angle of 50°, pass straight up to 

 the borders, being perfectly simple, parallel and craspedoth'ome ; tlie tei'tia- 

 ries are also simple and very thin and are siimewhat distant and at right 

 angles to the secondaries, the areolation or their sulxlivisions lieing obsolete. 



Except for the regular, nearly round form of this leaf, there is nothing 

 in its appreciable character which indicates a deviation from the normal 

 characters of the leaves of Fagus. The nervilles are somewhat more distant 

 and the borders more perfectly entire than we see them in living species of 



•Foss.Pfl.der Rhein.-Wett. Tert. Form., in Palaeoutogr., vol. 8, 1.S59, p. 9:!, PI. xxvii, Fig. 13, i:Ja,b,o. 



