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Show 100 HOOKY MOUNTAIN will bP abiP to mak otltl'r eollections from tht'se plant-beds during Lh<· ])I'' 'l' ll t. H<'IU;On. "The specim en co ntaitw<l iu the bufl', marly limr tonr, of tlto Gn•en Ri V('l' se ri es [IT(' p;l'll\ ·rail.}' uot IV(']} ])rt' •rvt' \1, auu y('t, 1 think, ea.rcl'ul C'at'<'h at the locality, wlu·n• ih<•Hl' plant sent- 1110 wcrl' obtaiued, would n•sult in tht· discovery of HO ill <' fino lhino- . I would e 'lW ·in.lly urge a se:uelt for frnits. "'l'lte a p •rt of tlw Rmn.ll gronp of plants now before mt' fmm (i- rP<'n Rin•r i mor<• tropical thnn any you lta.v bmugl1t from thP \Vp ·t. nnd a: we lm\'e reason to holit•n• that our Eoccnt• t·limah• wa wamH' t' t.lta.n th<• J\1 iorPnt•, and that l'ron1 the Eoc·t>ut• t~po •h to th · Glacial ]Wri otl a procrr<'H ·ion or tenqwrn.turo took pl:t('(' tIt\' Ureen lliver b •dt; would . 'Olll to Ill (' to pt·ovt• Pari ic•r than Jato J\1 ior·t• llt'." Geologi 'Is ltav<' ltH y1•t t•xp lorocl tl1iR intt•n'sting rPgion only in the mo;.;t suprrfi cial \ra,r, and wP havl' ·aught but a glimp ·e of tht• wontl\'rful tr nsut't'S which will ~O liH' tim • b • broucrl1t to ligl1t. T.IH• Rkn.ta :1.1" JWal"iy l10rizontal , and tlw rin•rs l1avp cut ·uch clet•p clla,ntwls in them that th\'y can be studied witlt co tuparativP l':lt:il'. Prof\;>ssor ]) •nt·ou, who ma.dt' an exploratiou of tlt <' co untry a.hout 100 mil •s ·o utl1 of tl1e milrond , lms giv<'" a cr t':l Jlhic arco un t of hi ;.; t1ist·ovt'ri • · whielt ·l1ows v< ·ry ·!early llw n·eooTa- r-, . ' ' t"" t"'' phical Pxkn ·ion oft h iH fol'lnation . N ea.1· tlte j n neLi on of' Wit ih• and Gn•(•n Rivt•rs, partly in Colorado and partly in Utrtl1, he de <Tilws an inlllH'Il Ht' Tt' rtirtry dupo it, ·om poKed of a r;P ri <' · of petroleum sltalt> s, I ,000 J'Pet in thirkne 1-1, varying in color fhllll t haL or cream t·o Ute blacknp:,;::; of eanH\'1 coal. Tho shal es abonntl in lh<• imw •s ion · of leavt•r; and of vn. riou::; SI 'Cies of im;erts. l\lr. ~:tlll ll <'l LI. 'c llllll<'r, of Boston, publish •d in till' "American Naturalist" for 1•\•b ruary, 1868, a lll OHt in te resti no· a ·counL ol' the insect co11<'l'tct1 by Pt·ofl'HHOr Denton. Ht• Hays : " 'l'h mn.s es of ro<'k ""<'I'L' crowdl'd with n•mai n::; of i nsPcts and lP<l.l"eH or dPl'iduous trees. Bdwe '11 (j() aml 70 p 'ei<'H of ill K('(:ts wer. bmug lt t honw, l'l'lWPsc nting Hearly all tit ' difli•rcnt ortll'rH; about two-tltirdH of lhe speeit•s WN' 1iit>s, ROl li(' of tltt•m tho perfect in srl't, otlH•r · tht• maggotlik(• larvm, hut in 110 in ·tanet• clirl tilt• imao·e and l:trv:e oft hl' ·antt• in : 1• ·t b oecur. Tlte o- n•a.Ll'!" ]1at·t of tho lwl'ti P, wl're quit •. Hnmll , tiH'n' wne tltn'o or four kind~:; of lfornoplem (all i •d to tit' h'('ehoppet'H), ant· of two difft>l' nt g nem, and a, voorly pn,serv d moth. P(•rltaps ami n ute 7'/i.Ti]Js, belonging to a o-roup which lta. n<·\·t·r been found fo •t;il in any part of th' world, i of tit • greatc t intere t. WJ~, 'l'WAitD '1'0 l~EAH. HIVlm. 101 "At th pt·f's(•nt day th •s tiny and a.lmo t mi r·o copic ins ts live among the petal · of 11ownr., an(l one ~>pec i<· · i · uppo t•d by ome ntomolocrists to be injul'io1ts to tho wheat, oth rs bl'liPv that tlwy coll o- t·ocra, t1· in tlte wlwa.t as w •ll as in tlw fl ower., in th' hope of 1in<ling foo<l in tlH' ·till ·mallPr and mot·e 1t lples inst'ci · wltieh am fonnd Lit r('. lt is astoni ·hi no- tltat an iusc t ·o delicatt• and in : ig nificant in il'. ' can lw ·o j)'l"ff•ctly pr H •rv(•d in theS(' .-tone·; in tho b<'Kt S] l' imons tlw bo ly i · crn slw<l ancl di placPcl, y t the wings rl'main llllinjtli'C'cl, and every hair of th it· broacl but mi ro~ opic friug can bl· co un ted." I roft'Rr;or Denton al o di~:;cov('t'' l in t hiH rp<rion a clPpo it of pdt·oleum coal, whicl1 apprar · id·nti cal with and would yiell as umeh oil as tlw Albertite coal of Nnw Brunswi ok. A.notltN 1 ed rcs<·ml>litw 'alllll'lilt> wa~ noticed 10 to 20 fp •t in tllicklll'SH, whir·h Pro f'<~sso r DL•nloll 1J •liovos would product' oO or 60 o·allons of oil to tl~t• toll. lf so, a sing It b 'd lt ' rO would y ield twt'uty milli on bal'l'l'l · of oil, ot· a t h o u ~:;a ncl tinH•s as mueh as Anwrica J1a produced ·inc • 1wtrol ' lllll wa · di ::;covL'rl'd in P P nn ~y l vania. It iH cl •ar that these sl1al l' · with th' fOHH il i11 st>c t ~:;, ll'al· ·s and pl'trol(•um are only a out lt rn exit•n ·ion of Uw heels wltil'h W(' have so fino an opportnnity to . tudy around till:' (hl'en River tation. From J3ryan we paH ov<.•r a ]ll'Culiar .n•giou, diff'erincr agai n in it~:; snrf'ace fl'atun'H from any pr •viou:;ly l'(' ll 0 11 Ollt' rout<>. Far Li ta11 t to the ·ou th wanl tho ·i ngulat· <lom o-1 ike appPantnct• or wltrtt W(' lntve llSnn.lly Hty lt>d LlH· "Bn.u Land " i vi ·ibl e, th •ir brown a11d indumt •d sand;.; aml clays ltaving wcather'd into t'('lllarkablP form ·. Photograph XIJ.T. i ·a !"inc vipw of a notl•d Jan<.ltrutrk al ouo· th • old stage road, whiclt Ita n·ccivcd tho !lame· or "Church Buttl>H," frOill its :;uppOSl'<.l ]'('HC!llblance to a church. To thi · formati on I havp given the uanP of the "Bridger Group,'' nnd T :t,m co nvinc 'cl that thi .. n•gion was o ·eupi >d by a va~:;t frm; lt watt•r lak ', about lhP :tllW timP tl1at til t' om' on White Riv1•1' ~x i ted . From th<~ indi cati ons cl~ ri v •c1 from tho fo · ·i I r 'mains al rcacly d iscoverPd, thiH g roup of' b d~:; i ~:; clr 'tiuel to yi ·ld a. f'auna SC'cond only to tlta.t of the ' Bad Lands" of Dakota. o far n. y •t known all the r ' lllai n · appear to b> of Middl t~ T<•rtia1·y n.n·p. Ammw tlt.eso fcm iiH those of turtles an· c ·p cially nuntC' rous, a multitucl> of' f'mg nH'IltH ton·>Liter witlt S<'V(• ra.l forn1 · n 'arly entit'<', havt• lJ •pn coll et d and :ent to Prol'• or Leidy, of Phila< l lphin., for ' xamiuation. Th sp ·iuum · lmve b pn .refen d t Lilt'' • •xtinct p •cie · ; tit' oT>atl'r numb •r p •rtain to a fr ' It wa.t ' I" t urtle whi ·It |