STRATIGRAPHY OF THE SKYKOMISH BASIN 



579 



The tertiary veination is similar to that of Ficus tiliafolia and 

 there is also something of the same palmate look; but in Ficus 

 the gap to the next pair of secondaries is only one-third as exag- 

 gerated as here. The margin of F. tiliafolia, moreover, is entire. 



Protoficus zelleri of Lesquereux (Bull. Mus. Comp. Zool., XVI, 

 No. 12 [1888], 50), while described as notably palmate, is more 

 cordate at the base and the border is merely crenulate. This leaf 

 is only 7X5.5 cm. 



Fig. 9. — Protoficus fossi. (5 natural 

 size.) 



Fig. 10. — Protoficus fossi. Q natural 

 size.) 



Protoficus inequalis (Newb.) (Proc. U.S. Nat. Mus. V [1882], 

 512) is not described as having a gap between the lower end and 

 upper secondaries and is notably unsymmetrical at the base. The 

 margin is merely undulate. 



Genus Pterospermites 



Pterospermites whitei (Ward) (Fig. 8) 



Ward: U.S.G.S. Bull. No. 37 (1887), p. 94; PI. XLI, Figs. 5 and 6. 



The species from the shales of F 831+50 is in marked contrast 

 to the foregoing Protoficus. The identification is rather certain, 

 although the base and tip are wanting. The midrib is not quite 

 so sinuous above as it is in Ward's figures. The form is noted 



