44 DESCKIPTION OF SPECIES. 



POPULITES, Lx. 



Populites Liancastriensis, Lesqx. 

 " U. S. Geol. Eep.," vi, p. 58, pi. iii, fig. 1. 



Populites elegans, Lesqx. 

 " U. S. GeoUEep.," vi, p. 59, pi. iii, fig. 3. 



Populites cyclopliylla? Heer. 



" U. S. Geol. Rep.," vi, p. 59, pi. \v, fig. 5. 



From a remark of Professor Heer, this leaf is not referable to his 

 Po;pulus cydofhjlla, as I supposed it. Indeed, from the craspedodrome 

 nervation, this leaf is rather a Cissites than a Populus. Its relation is as 

 yet undefined. 



PLATANEiE. 



PLATANUS, Linn. 



Platanus Newberryana, Heer. 



"U. S. Geol. Rep.," vi, p. 72, pi. viii, figs. 2, 3; ix, fig. 3. 



Platanus obtusiloba, Lesqx. 

 "U. 8. Geol. Rep.," vi, p. 69, pi. vii, figs. 3, 4. 



Platanus primaeTa, Lesqx. 

 "U. S. Geol. Eep.," vi, p. 69, pi. vii, fig. 2; xxvi, fig. 2. 



Platanus Heerii, Lesqx. 

 Plate III, Fig. 1 ; VII, Fig. 5. 

 "U. S. Geol. Eep.," vi, p. 70, pi. viii, fig. 4 ; ix, figs. 1, 2. 



Fig. 1 of pi, iii represents a fragment of a merely undulate, not lobate, 

 leaf. The nervation has the normal character; the petiole is longer than 

 I have seen it in any other specimen of this species. Another leaf, pre- 

 served entire, seen in the Museum of Comp. Zool., Cambridge, No. 225, is 

 still smaller than this one, only 6 centimeters long and 5J broad. It has 

 the same nervation, the borders more deeply undulate, and two short, 

 rather acute, lateral lobes. Fig. 5 of pi. vii is still a smaller form of this 

 same species. 



The leaves of this species have been found at two different localities 

 on the Salina River and near Fort Harker, Kansas. 



Platanus diminutiva, Lesqx. 

 "U. S. Geol. Rep.," vi, p. 73, pi. viii, fig. 5. 



