Collected by Mr. George Gibhs. 521 



of the exterior pair of lateral nerves, and in the polygonal 

 reticulation of the secondary nervation. 



Formation and locality. Tertiary strata, Birch Bay, W. T. 



QUERCUS CORIACEA Ncwb. 



Desc. Leaves lanceolate, long-pointed, acute, wedge- 

 shaped at base, decurrent on the petiole ; margins entire, 

 or rarely bearing a few acute teeth toward the summit; 

 nervation strongly marked ; midrib strong; lateral nerves 

 numerous, sub-parallel, branching and inosculating at 

 the summit. 



This is one of the willow oaks represented among re- 

 cent species by Q. imbricaria, etc. 



The figures given illustrate the variations of form ex- 

 hibited in the collection. From these it will be seen that 

 with the general character of Q. chlorophylla Ung., and 

 Q. elaena Ung., it is distinct from both, the first being 

 rounded above and with finer nerves, the second larger 

 and narrower, with a nervation finer and closer, and the 

 summits of the lateral nerves more distinctly and regu- 

 larly united. 



Formation and locality. Miocene Tertiary strata, Bel- 

 lingham Bay, W. T. 



QuERcus FLEXuosA Newb. 



Desc. Leaves four to six inches long, lanceolate, often 

 more or less curved, pointed, acute, narrowed at the base 

 to the petiole; margins somewhat irregularly sinuate den- 

 tate ; nervation strongly marked, lateral nerves forked and 

 anastomosing at the summit. 



This is evidently one of the chestnut oaks, but has 

 not the regularity of nervation which characterizes most of 

 that group, of which Q. castanea may be taken as a type. 



Among fossil species there are many to which it bears 

 considerable resemblance, such as Q. Gaudini Lesqx., Q. 

 Gmelini Ung., Q. iirophylla Ung., etc., but from these and 

 all others described it seems to be sufficiently distinct. 



JOURNAL n. S. N. H. G6 



