8(V2 MKSOZOIC FLORAS OF I'MTKn STATFS. 



anil ronsolidated witli tlie stem. Tho teelli are iVoni "> to 10 nun. lotig^ 

 narrow, linear, acute at the tij)s. with tlie inar<iins thickened so as to 

 appear corded. Tlie stems, in the internodes between the sheaths, are 

 striated with narrow parallel depre.ssed lines, differing markedly in this 

 respect from the stems of 7i. Phillij)si)\ which are smooth. These 

 furrows, when reversed by a cast lieing taken in the fine nuid, appear as 

 raised lines. The striation is due to the depres.sed lines between the 

 consolidated bases of the teeth, which, unlike those of E. PhiUijisii, do 

 not narrow out, but persist from one sheath to another. The mode of 

 striation is show'n in Fig. 12, which represents two enlarged teeth with 

 a portion of the stem at their bases. 



PI. LXXII, Fig. 12, represents a portion of a medium stem, on 

 which two sheaths are vaguely shown, one at the top. The teeth and 

 sheaths in all the specimens of this Equisetum are so closely appressed 

 to the stem that the}' are seen witli difficulty. Nearly all the specimens 

 show casts of the true surface of the stems. P'ig. 13 shows a small-sized 

 stem with several teeth well preserved in reverse. Fig. 14 is an enlarge- 

 ment of a portion of a stem with two teeth and shows the thickened or 

 corded margins of the teeth, a feature that Schenk gives in pi. i, fig. 13, 

 of Die Fossile Flora dei' Xordwestdeutschen Wealdenformation repre- 

 senting this Equisetum. But in Schenk's figure the cording is more 

 decided and the teeth are more strictly linear than they are in oin- 

 specimens. It is possible that these smaller stems may not belong to an 

 Equisetum different from E. Phillipsii but may be branches of that 



plant." 



Order LYCOPODIALES. 



Family LYCOPODIACE.E. 

 Goiuis LYCOPODITES Bi()no;niart. 

 LyCOPODITES ? MOXTANENSIS Foiitaiiu' n. .sp. 

 PI. bXXII, Fi<;s. 1.-), 1(1 



Several .specimens of a small conifer occur in tlie Geyser strata 

 whose proper place can not lie certainly determined. The amount of 

 material is too small and the si)ecimens are not well enough preserved 



« This species was mentioned by Professor Fontaine as occurring in Mr. Weed's collections, and tliis state- 

 ment is made in Weed and Pirssim's paper, p. 481 , but a careful examination of tlic specimens fails to sliow any 

 impressions of it sufficienll}- distinct for illustration. — L. F. W. 



