FLORA OF THE SHASTA FORMATION. 243 



Order EQUISETALES. 



Family EQUISETACE.E. 



Genus EQUISETLM Linna?us. 



Equisetum texense Fontaine. ? 



PI. LXVI, Fig. 14. 



1893. EquisetumtexenseFont.: Proc.U.S. Nat.Mus.,Vol.XVI,p.26.3,pl.xxxvi,fig. 1. 



1894. Equisetum texense Font. 1 in Diller & Stanton : Bull. Geol. Soc. Am. , Vol. V, p. 450. 

 One of the rock specimens collected by Messrs. Stanton, Diller, and 



Storrs at locality No. 11 shows a rather obscure impression of what was 

 evidently a stem. It contains what appears to be an imperfectly 

 preserved sheath, indicating that it is the stem of some smaU Equisetum. 

 Besides this, there are on the same piece of rock several other imprints 

 still more obscure of what seems to be the same kind of stem. The 

 stems seem to have originally been woody and straight, but are now much 

 macerated and mostly decorticated. The sheath, which is still partly 

 preserved, is swollen and reminds one of the plant from the Trinity 

 formation of the Comanche series of Texas," nanied by the writer 

 Equisetum texense. The size of the stem also agrees weU with the Texas 

 plant. As, however, the material is scanty and poorly preserved, the 

 identification can not be positive. 



Phylum sper:m:^tofhyt_a.. 



Class GYMNOSPERM^. 



Order CYCADALES. 



Family CYCADACE.E. 



Genus DIOONITES ]VIiquel. 

 DiooNiTES DuNKERiANUS (Goppcrt) Miquel.* 

 PL LXVI, Fig. 15. 

 1843. Nilssonia peden Dunk.: Programm d. hoheren Gewerbschule in Cassel, 

 1843-44, p. 7. 



a Notes on some fossil plants from the Trinity division of the Comanche series of Texas: Proc. U. S. Nat. 

 Mus., Vol. XVI, p. 263, pi. xxxvi, fig. 1. 



i Dunker sent specimens of this plant to Gijppert, who referred it to Pterophyllum and named it P. Dunker- 

 ianum after Dunker had named it Nilsonia pecten. Seward and others now place it in Dioonites, and Bunker's 



