FLORA OF THE SHASTA FORMATION. 251 



gray sandstone in the creek bank. This sandstone is much like that 

 containing the Populus'f Ricei (see p. 266), and it is probably hke 

 that of Horsetown age. 



The size of the midrib in the specimen in PL LXVII, Fig. 1, shows 

 that the leaf was probably full grown, and not a young one. Fig. 2 

 gives leaflets attached higher up on the midrib. Fig. 3 represents the 

 Oregon specimen. 



DiooNiTES BucHiANUS RARiNERVis Fontaine? 

 PI. LXVII, Fig. 4. 



1893. Dioonites Buchianus rarinervis Font. : Proc. U. S. Nat. Mus., Vol. XVI, p. 264, 



pi. xxxvi, figs. 3, 4. 



1894. Dioonites Buchianus rarinerins Font, in Diller & Stanton: Bull. Geol. Soc. 



Am., Vol. V, p. 450. 

 This is the terminal portion of a leaflet that in other respects, and 

 especially in its remote, spare nerves, agrees well with the variety rarinervis 

 of Dioonites Buchianus. The amount of material and the imperfect 

 preservation do not permit a positive identification with that variety. 

 It is, however, certainly D. Buchianus. This variety has been found 

 only in the Glen Rose flora of Texas. The specimen was found at locality 

 No. 11 and occurs on the same fragment of rock with the immature cone 

 of Abietites described on page 262. 



Genus NILSONIA Brongniart. 



NiLSONiA Stantoni Ward n. sp." 



PI. LXVII, Figs. 5, 6. 



Leaf unknown. Leaf segments mostly equal. Occasionally some 



are slightly wider than the average. The segments stand generally at 



right angles with the midrib, but in some cases are directed slightly 



forward, so as to be somewhat falcate. They are separate to the midrib 



and of the same width from base to summit. On an average they are 



1 cm. wide and 15 mm. long. Their tips are rounded, truncate, or else 



elliptically narrowed. The nerves are not well disclosed, but are fine, 



" The name given to this species by Professor Fontaine in his manuscript was preoccupied. I therefore 

 name it for Dr. T. W. Stanton, who collected the specimens.— L. F. W. 



