2o»i .Mi:>()Z()R' FI.OKAS OF IMTKI) STATKS. 



This plant was formoi'ly dotprmined by me as a new spories of 

 Angi()i)tei-i(liiini, for wliirh tlie specific name orcgonciific was sufijiested. 

 Witli this name it was quoted by Mr. Stanton in l^nlletin Xo. 183 of 

 the I'nitcd States (ieolojiical Survey. .\ careful i-ee\aminatiou of it 

 .sliows anastomosis of the n(>rv(\s, which iiidicat(\s that it is not Anjiiop- 

 teridium, but a new species of Sagenopteris. 



This fern was found in three sj)ecimens, two at the locality near 

 Riddles, Oreg., and one at locality Xo. 3. One of the specimens found 

 near Kiddles has an excellently preserved imprint of an entire lateral 

 pinnule. The other shows a neai'ly entire middle j)ininile. The foi-mer 

 is represented in PI. LXV, Mg. 36, and the latter in Fig. 37. Fig. 38 

 represents the specimen originally referred to S. lalifolia. 



Sagenopteris eli.iptic.^ Funtaini*. 



PL LXV, Figs. 39, 40. 



ISSO. Sfif/enopteris elliptica Font.: Potomac Flora (Moiiogr. I'. S. Geul. Suiv., 

 Vol. XV), p. 149, pi. xxviii. figs. 9. 111."), l.'ja. 16, l(5a. 



Several specimens of a fern were foimd that seem to be Sageno))i('ris 

 elliptica Font., of the Lower Potomac formation of Mrginia. The fossils 

 are in the form of detached pinnules, which are, in most cases, entire. 

 These have a close resemlilance to the Potomac fossil and can hardly i)e a 

 different species from it. The pinnules vary a good deal in size. The 

 smallest are rather smaller than any seen of the Potomac plant, and the 

 largest are of the same size with the largest of that plant. Two or three of 

 the smaller-sized pinnules have a more obtuse tip than any of the Potomac 

 fossils. One of these, given in PL LXV, Fig. 40, is almost spatulate in 

 form. Possibly these may belong to a different species of Sagenopteris. 

 The imprints as a rule show the elongate elliptical form of the \'irginia 

 plant, with the midrib prolonged beyond the middle of the pinnule. PI. 

 LXV, Fig. 39, gives a pinnule of the largest size, which shows well these 

 features. It is at the l)ase somewhat tmsynunetrical, the lamina on one 

 side })eing broader than on the other, owing prol)ably to th(^ fact that this 

 is a lateral pinnule. 



The plant .seems to be more connnon than the otlier species of Sage- 

 nopteris, but still is not very common. It occurs at localities Nos. 1 , 18, 19, 

 and 21. 



