JURASSIC; FLOHA DOUCJLAS COUNTY, ORE(}. 117 



enlarged. V'l^^. 7 and 8 show a frafinient 4 em. wide, indicating the 

 nerves quite well. 



The plant is not abundant. It is most coimnon at locality .\o. 7. 

 It occnrs moi'c rai'ely at localities Xos. 2, fl, and IS. 



Ctenis AiHicri-ATA l-"i)ntiiinc? 

 I'l. XXl.X, Ki^^ 1. 



IS!)(). CttniK (lunniliila Font.: Am. .Idurii. ScL. 4lli scr.. Vol. II, \^. I'Tl (iioincii.). 

 10(10. Cliiiin iniri<-iiliit(i Fiint.; 'twcnticl li Ann. I\i'|i. f. .S. (icol. Surv., ISilS !l!l, 

 Pt. II, |). .".."><'., 1)1. Iviii, lii^s. 1 :;. 



At locality No. 7 a single .specimen of a lai'gc Ctenis was ohtained 

 that agrees qnit<» well with (\ auricniata, a plant first found in the 

 Oroville flora. Tiie preservation is not perfect enough to make the 

 identification positive. A portion of the midi'it) was obtained having on 

 one side the basal i)arts of two leaflets, one pi-etty well preserved. This 

 is .") cm. long and 'A cm. wide at base. It is attached apparently l)y 

 all of an unnarrowed base, whi(;h is not auriculate. The leaf sul)stance 

 was very thin and left very little coal on tlie i-ock. The nerves are 

 strong, very remote, single at theii' bas(\s, but anastomo.se freely about 

 15 mm. above tluai' ba.ses — more freel\- than in the Oroville specimens. 

 It may t)e a new species." 



Genus ENOEPHALARTOPSIS Fontaine. 



Encephalartopsis * OKECiONENsis Fontaine n. .sp. 



PI. XXIX, Figs. 2, -.i. 



A single fragment of a leaflet, with resemblance to those of 

 Encephalartos, was found at locality No. 4. It is of doubtful affinity 

 and is mentioned because it certainly differs fi'om th(> other cycads of 

 the Oregon flora. It is narrowly linear, narrowing gi'adually toward 

 its end. It has a thick, dense texture, which gives it a very rigid aspect. 

 Apparently it had a firm, almost hoiiiy epidermis. It must have had 

 a considerable length, foi' the part preserved, though a small portion 

 of the original leaf, still shows a length of (\ cm., with a maximum width 

 of 4 mm. It had spiny points going oh' at long intervals and tin-ning 



" Tilt' spcriiiiiMi was oil two pieces of rock, one the counterpart of one-lialf of the leaf shown on the other. 

 In the latter tlie leaf was foldeil on lioth sides of a thin shili, the nieliis running along the thin edge. The 

 figure (PI. XXIX, Fig. 1 ) shows the frond unfolded and givi's u fair idea of it.s nature. — L. F. W. 



