OCR Text |
Show 305 [ 17J ] Y k,h1· 1. 0 p. 147, n1 l. 8, figs. 6 and 7; Sphen. lVillia?nsoni, Brong. Ifi.st. or :s ' · 1. 7 . 1 , "l"l r ·1 , 1 · \', Foss. i p. 177, t. 1~9, 1gs. 6, , auu t3. te 10 st nnuer consLueration h eg.ever i~ q' uite a difl'er0.ttL ~pucies. Jrt the fi~uro 1 a, tlte brallcltes auJ ow ules 'a re more lax; J't (.{Jtre l t I .r s a mngt11. 1·t et I purtt.o tL pn~t~ it gcucral nsp~ct, tltis f(>ssil. rt!scut!Jies the_ c~enus Prtclt.'lfJJlf'ris tv wltich I had beeu incltncc.l to refer_ It, bnt 1or tile c.ltgtlate cltaracter uf tile J'llllllliCS mallif'ested uy SOllle speCtlllellS. 4. SJ>HKNOP'l'J~Ius (?) ·r·H~F.<> LTA 't'A, 1~1. 2,fi!S~· 2,.2 a. (~o . ~ u ol coll<:ction.) lJescriJJiion.-.Frond lllptnnate; p11111tt: tnfollatu; putnule:.; elliptic, liarrowing at the uuse; rucllis slctH.lt! r, llcxn~ns; f!·nctificutio_u tet:ntinal, raceme tKe from tile piunules gradt1ally becotn ttt~ s111:rle and fructrf(•rons. Fig. 2 a-part of tl1~ f~·nctili·r~ns portJot_l · t llarge~l! s.lw_witto· tlw cap~ uk~ appurcu tly immersc<.l Jll lite t .lllcl~etwd J>llllllllc. J Jus JS a tHost hcauttruJ <illd ~raceful species, approadung 111 SOllie respects to the S. paucituliu jn~ ~ ~escribeJ . '5. GI.O"S'<.ll''l'El\'IS lJJIJJ.J.Jt'SJI ?. J>J. 0 t:J<rs ~ ~ (l r.lJ r.) C' (Nos (>' r1 8q - ~ - . ....,, lJ b • v, v ' v ' . • .. • "• .... , ctlld 86, of t.he collectil)tl.) Compare Ulossnpte1·is Phillipsh', HrotJg. ll isl. Veg. Foss., p. 225 t. () ~ .. bi~, fig. 2; 11N'<IJJit'ris pu'ltcljolio, Phillip:::;':-; Uecd. York hire, p. 119, pl. T"lll, fw. . fJe3cription.- 'Lc~1v ·s liucar-lauceolatc, narrow, llarrowitt"· townrds he base alH.l apex· tlt~rvnles oblique, diellolomons lax, s arcl'ly Jistittc!, ~ubimmcr ·eel itt tile thick parc11Ch yma.' l3rong. ·u! sup., p. 88 ). The specimen fig. 5 corrcspoulls precisely with tlw figure nf' Hrou:rni :trt. pl. 61 his, fig. 5, both iu form of' the lea( aiHl arra rtgcmertt of' til ttnrvll lt·s, oas to leave little donht of tlteir ideutity. Fit.;ure 5 is :1 lttwrly perlcct le:1f uf this species; fig. 5 a is the base of' a ttother spucimcn, ltaviug a lor tg fl)o t ~ talk ; fig. 5 b is the base of' <tnothcr lear with l'ntctificatioll (?); fig. 5 c tltt' ~ame magnified. Tit is structure i:::; ~o partial, that it can only wi.J.It doubt. lw (:{erred tO ti1C frllctificatiOII ol' file pla11l; anu it is IIOt itnprolwi>le th nt tilL• ~ame may l>e SO tlJU par:tsitil' body or t!w l'o- u· · 0f an insect wlliC'It have LH'ctt uepositcd upon the leaf'. \Nilatever tltis nw.y have becJJ, it doc~ not appP~tr ·o have been calcareons; a11d Llw total absettce of calcareom: uw.tt<'r i11 tlw r?~k i au objection to n• f'(•l'J'i ug tllc sauw to Jlustra, or ally oi t llf' JW r,l. t~tc coral·. The fems are ah tllH.lattt iu tlte rock aL this point, at td lllilll \· ol themuubrok 'II, n.ud evide11tly 11ot l~tr or long tra11sport •cl, which, lt <HI they been, would ltave 3ivu11 support to the suppositio11 of this body bl'itl? coral. lltavc referred tit is ~qwci 's to t ltc G lo~~optcri · Ph ill i psii, as being thP only description artd figtrre ;lccc.-~sihlc to me, to which tltis fossil bears any n~ar rcsentblanee. The h.<,ological positiou of' that fossil is f'O well asccrtatned to be. the scltist~ ot' tlte rrppcr part of the oolitic period, tlmt, rclyi11g npou tlte c~tdotl<'t' oft'ered by a ~ingle specie , we might regard it as a stron p. u:~tment fo1: ref'vt·~·ing all the other ~pccimcns to the sante geologic~[ period . . lhe tw~ lnllowlllg species, or varieties of the same species, lhlve be '11 tdcrrcu Wtth doubt to tlte c'enus pecopten's · but a close examination show'-' t\lC midrib only partially Sistiuct, and in some cases. carccly visible, wltile t te nervules radiate (]\)Ill tlte ba~e. ru other cases, tlw willrib appears well ~lHtrk~d at the base, but dis:q>pca r~ inrlltmcrou~ ramifications before reu it ... lltg t.Je apex. Tlte c·IJaractcr tlH·ref'ore o-ivc•n by Brono·niart of "nenw medt 0 td ' • b o va e nota to, nl'c atJice ~'vanescentt•," is inupplicable to tlwse speci<· .. 20 |