FLORA OF IHF KOOTAMK FORMA TION. ol 8 



buiulles. scat t(M'(>(l ai'oiiiid the stem, and on fallin,^ off l(\n\(' inai'ks that 

 are more oi' less cii-culai- in form. The original niunhei- of leaxcs in a 

 hunclle could not he made out, as in no case could it he detei'miiKHl 

 whethei' oi' not all were preserved. Tlu' stems, in pi'oportion to the 

 size of the lea\'es, are ahva^'s cjuite stout, a feature olxserved in the 

 Potomac forms. 



PI. P.XXIIl, I'iti. II, shows a i)()i'tion of one of the stems with the 

 basal parts of some of the leaves still attached. The leaves are in all 

 eases frafrmentarv, so that tlieir orifjinal lenijth could not he made out. 

 Fiji. 1- shows a portion of a pi'iiicipal stem .and paiis of sevei'al branches 

 that go off as if they had oi'isiinally foiined ;i whoii, remiiidinfi; one of 

 the mode of branchiiiii; of (Vphalolaxopsis. Fitj. I'.] shows a stem with 

 many leaves. I'iii'. II represents the specimen collected by Mr. Weed 

 at the (Irafton locality'. 



This plant .seems to have been rather connnon in the (Jeyser beds and 

 it is on(> of the most characteristic of theii- fossils. Conifers .seem to be 

 quite rai'c in these strata and this is decidedly the most connnon of them. 



Besides the undoul)te(l plant fossils found in tlu> (ievsei- l)eds there 

 are two forms of imprints that probably belong to .some animal with a 

 thin bivalve shell. They resemble most the impiints of the shells of 

 Estheria. If they i-epresent this genus, thei-e are probably two .species of it 

 in the Geyser beds. Both are quite small. The larger one has a length 

 of 11 nun. and a maximum width of (> nun. This is i-epre.sented by one 

 specimen. The otluM' shows three impiints. It is more nearly circular 

 in form than the larger imj)rint .and h;is dimensions 4 nun. I)y G nnn. 



srM.UAh'Y A\]> coxcLrsioxs. 

 The list of plants found in the Geyser sti-at.a contains the following 

 forms : 



1. Dicksoiiia moiitiincnsis Font. ii. sp. 1(1. Xilsonia sclinunil)urgensi.s (Dunk.) 



2. Dicksoniii pacliypiiyllii I*\)iit. .Xatli. 



■i. Tliyrs()|)t('i'is ('lliijt.ica I<"(int. 11. Zaniites ai'cdciis (lop]). 



4. ('iaclo])lii('l>is I'alcata niontanen.si.s 12. ("vcadcospcriiiinn inoiitancn.sc Font, 



Font. n. cuMil). n. sp. 



o. ("liuIophl(4jis lietero])liylia Font. 1'!. ("cplialolaxopsis raniosa Font. ? 



6. ('la(ioi)iil('bis constricta Font. ^ 14. Xa<j:('io|)si.s lonfjil'olia l""ont. 



7. K((uis('linn Pliil]ii)sii (Dunk.) Bmnpi. l-"). Naijciopsis nionlaiicnsis Font. n. sp. 

 bi. Equisoluni Lycllii Mant. Hi. Laricopsis lon.i;ifolia latifolia Font. n. 

 9. Lycopodites ? nioutiniMisis I-'ont. n. .sji. var. 



