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Show [ 174 J 30-! B. 0 H <.; A N I <...: I{ .E M A l N ~ . J)escriplions o.f o'rganic 1'e1n.ains collected h,y Capta1·n_ J. C.· F1·emo11 t, i 11 the f!Cogruphicat s'u1·vey of Orf'gon and No·rth. Catijo·rnut: by James 1/alt,paheontologist to lite SLate o.f New York. pLAT J.;S I AND I I. Til specimens here dcscrib cl arc all from one locality, inlougilllde 111 , Jati1udc 11 1~ 0• They occur in a light-gray indnrat ·d clay, which iscutirely free f'rom calcarcou~ matter, very brittle, aud having a very imperfect sla1y ~trurtn:·c. Nearly all the species diJl'·r from any describe<.] in Brongniart' "!list. I ""l'g. Foss.," iu Goppert's "/.,!;stcma Pilicu m 11'ussi!iu ·m," or in Phillips's "Gcolog;l) of Ym·lcshire." 1. SpnJ~NOPTT·:Ius FnBJ\IONTL Pl. 2, figs. 3, !~a. (No. ll of collection.) Compare sphenopteds c1·enula I a; Bro11g. 1 I j!jt. V CO'. Foss. i, p. 187, t. 56 f. 3. JJeslTij;/ ion.-Frond IJi pi tllla te, (or tri pi nunte?) rachis UlOdcratcly strong, striat<'d; pinum oblique to tlte rac·his, rigid, nwdcrat<·ly approximate, ulterllate; pilllll11r~ snbovatc, SOlliCW}Jat decurrent at the base, aiJont three Or four lobed; fructification very Ji~tirtcl in round dot::; (cap~ulei:i) of carbona. ceono;.; matter upou the nw.rgins of tlte pinnul<.>s. 3 a, a portion twice mao-. ll ifi >d. I ll~vc 11n.mctl this beautiful nnd unique species in honor of Captain Frc· lllOtlt, Ull<l as a testimolly of the bcllefits that science has derived from hi valuable explorations ou the west of tile H.ocky 1nouutaiu~ . 2. ~PIU.:NOPTI~ ni· TRil.ouA. Pl. 1, fig. 8. (Nos. 65, 7H, auJ eo,of cullec· tio 11 .) n.·.w·ription.-Ii'roucl hipinnale, or lripinnatc; rachis slcndrr fl~xuo~ : pinna· long, (} ·xuou~, distant, opposite, perpendicular to tlw rach1si prn· nnle ·oblong, snb·trilobate, opposite or alteruate, narrow at base, d1~tan1, pe1 pctHlicnlar. Tlte distant, long, ancl flexuous pinnm, with tho stnall tdlobate pinnules, distingtli~h this species. In general features, it approaches ~onwwhat the splw1wpteris rig·ida, (BrotJg.,) but diifcrs essentially in the snwllcr pinnu~es, which are usually nearly opposilc, an<.l in never being more than sub-tnlo· bate, while in 8. 'rigida tltcy arc often deeply 5·1obed. 3. SPln:NOP'l'F.Hls (?) PAUcn~ol.JA Pl. 2, figs. 1, l a, 1 b, 1 c, 1 d. (No. 118 of collection.) /Jt>scripl ion.- Frond t ripinnatc ; rachis rather slender, with long, lat~ral, stra:~rht branches, which ar? sligl~t I y ohl iq t~e; pinn::c slender, nearly at rtg.h~ a11g.c., alternate and opposite· p11ttn!lcs mwutc oval-ovate, somewhat diS t~ut, opposite or alternate, cxp~udcd or nttcuuat~ atl>asc, ~omctimcs deeply 1>Jlobed or cli3itate; midrib not appureut. ·r~,is species was evidently a beautiful fern of large . it-e, with slend~r, ~pa.r~~ foliage, giving it a peculiarly delicate appearance. In .s~m~ of 1; vane tiCs, (as figure 1 b,) it resembles Sphenopteris digital a; Phillips s Geo ' F 0 S s~ I L F E R N S . rOilfr:TtON Of l(lf r;f'or;lr Af)I/I('Al SIJRV[Y l)f Ollf.GON ANO NOtt'flf 'CALWOHNfA . ' . |