FLORA OF Tin-: SHASTA FORMATION. 231 



and may lje doubtfully rcferi'od to tlic Wealdcu ^^jiccies. The imprcssion.s 

 arc of fragments of ultima((> pinna^ which show a few pinnules without 

 soi-i. PI. LXV, Fig. 22, gives a representation of the best specimen found. 

 Fig. 23 represents the specimen formerly referred with doubt to O.stuuiKht 

 ilick.sonioidcs. 



It occurs at localities Xos. !) and 21. 



Family GLEICHENIACE.E. 



Oeims OLEKTIENIA Sniiili. 



Glpuchema X()iii)KNSKi()i>i)i lioor? 



PI. LXV, Figs. :i4-2',). 



1S74. GlfH-h(ina Xordntiil-h,ldl Ilcpr: Fl. Foss. Arct., Vol. Ill, Ft. II (Kn'itlc-Fk(ra 



(Icr Arcti.schcn Zone), p. •")(), pi. ix, figs. 6-ll* (pxcl. figs, lie, llf). 

 Isil4. Pecopterls Mrirtimrrh Font.^ in DilltT i.\c Stanton: Loc cit. (PI. LXV, 



Fig. 2S.) 

 1S()4. Aspidiuni liit( ropliijlluiii Font., part, ((Uoad Cat. U. S. Nat. Mus., Nos. '.WXi 



and ;^!)!I7 in Diller ^.t Stanton: Loc. cit. (PI. LXV, Figs. 26, 27.) 

 1S!I4. Osmundd (lieksonioidfs Font.? in Diller & Stanton: Bull. Geol. Soc. Am., 



Vol. V, p. 4.50, quoad Cat. U. S. Nat. Mus., No. 4004. (PI. LXV, Fig. 29.) 

 ls'.».") [1S96]. Pecopteris stnctinervis Font.? in Stanton: Bull. IT. S. Geol. Siu'v., No. 



133, p. 1.5. (PL LXV, Fig. 28.) 

 1S9.5 [1S96]. Aspidium hf'fi'rophi/Ilnm Font., part, (|uoad Cat. V. S. Nat. Mus., Nos. 



3992 and 3997, in Stanton: Loc. cit. (PI. LXV, Figs. 26, 27.) 

 189.5 [1896]. Osmundd dick-soidoides Font.? in Stanton: Loc. cit., quoad Cat. V. S. 



Nat. Mus., No. 4004. (PI. LXV, Fig. 29.) 



Small fragments of ultimate pinna^ of a fern witli piinuiles idcMi- 

 tical in character with Heer's Ghichenin Nonienftkioldi were found at 

 a number of localities. The specimens occur only in such small frag- 

 ments that positive determination of them can not be made. All that 

 can be said of them is that the plant is, so far as its character can l)e 

 made out, identical with Heer's fossil. The specimens are quite numer- 

 ous, showing that the plant was rather common. 



PI. LXV, Pig. 24, represents a fragmeiit possessing the largest 

 pimndes seen, which belongs to the midtUe portion of some ultimate 

 pinna. Fig. 25 gives the terminal portion of an ultimate pinna with 

 small pinnules. None of the specimens seen were more complete than 

 these small fragments. Fig. 20 represents the specimen No. 3992 of 



