470 UK(;iiKi{(:m':s siiii la (composition 



hraiic \ilcl!iiH', il csl, rvi.lcnl i\u\'\\c sr loniH' ;ni\ drpnis .ic h (■oiicJic 

 <'MenHMlii |.n)l()|)l;isiii<>(l(> Wvni; m;ii.s ;, (|ii,-l n.onicisl, sr r()rMi<'-l-<'llc? 



!{\i.sl<'-< lie ;uiloiir dcs jVuiu's (nils (•(.n!<«inis diuis Ics IiiIm's (.v;n-iciis, on 

 ii.> sc (nniip-l-cllc (|(ic plus Um\? M. IM1ii-(T -.nUwl que Ics (•(■I1iiI.'s-iii('t<'s 

 (irs (nils |M.ss(Mlcnl imc vniic iiiciiiliraiic el (iiic n'dc in('iiii)raii(^ s'alloMi,^ dc 



j'H'oii a lunii.T iin \('nlahl<' liihc, .loiii la panu ci ire Ics divn's (nils ric's 



(Ic (Tile cclhilc-nK'n' el, nMinis en cJiainc. .!(^ irai jamais |)ii nic, vom-.unvrv 

 (I,- Fcxislnicc (Ic CCS (nirs-iiM'n's, ci (rapirs iiics ,.l>scnali(.iis. la luniialioii 

 (Ics cliaiiics (I'dMifsdoil rc(;cv(Hr liuc cxplicalioii Ionic (lifl.'iriilc dc ccllc ijhc 

 M. IMlii-cf Iciira doiin.'c. I.cs cliaiiics soiil-cllcs ciiloiiircs d'mic mciuhranc 



nicinhi-aiic, cl il inc scnil)l(M|(ic , mi Ic iii(h1(> dc foniKKioii dcs cliaiiics, iiiic 

 Icllc iiicinl.raiic iiVsl i^mk'tc a.lmissihic. Orlcs, Ics (nils soni ciironscrils par 

 Mil c<.ii!(>iif assc/ IoikV-; iiiais cc fail iic [)|-(miv(^ iiiiljciiinil Tcxislciicc (riiiic 

 niciiihraiic; il (lniioiili-c sciilciii(;ii( (jiic Ic pr(»l(»|)lasnic piT,s(Mil.c iiii p()iiv(jif 

 rclViiii^riil siipcri(Mii' a ccliii dii milieu (|iii IViiloiirc. 1^1. IMhij^cr a (discnc tpic 

 dans Ics (.vaircs soiimis pciidanl, pliisinirs jours a raclion dc Tacidc (.xali(pic, 

 (HI rciicaiilrc dcs .nils oi'i niic incmhraiic. v('ri(ahl<> sc scpa re dc la snhslaiicc 

 proloplasmaliipic soiis-jaccnic. Mais I'aclioii dc Pacidc ()\ali(pic uv. pciil-cllc 

 rciidrc c(»mplc dc la loriiialioii dc ccllc incmhrancP l\\'sl-cll(> pas uii pnMliiii. 

 arlillcici? 



.Ic crois (pic (piaii'J Ics (nils sc soul, c(.mp!(-lciiiciii, is(.l('s dans dcs lullinilcs 

 iiouvcll(MiiciiU()riii('s, ils iroiil, pas encore, an d.'hiil, dc vraic niemhrane ccl- 

 Inlairc, el, s^il en csl aiiisi, il csl clair (pic l(>s (nils en cliaiiics cii soul, com- 



i)i(!lcm(Mil dcponrvMs. J'ai do > pins haul, Ics raisons (pii me porlcnl, a croirc 



(pie Ics ieiiiics (culs iioiivcllem<-iil is()l(;s dans Ics lolli(uiles sonl deponrvns dc 

 iricinhraiK! vihdliiie. 



Dans scs rcclicrclics snr Tovaire dcs oiseaiix, M. (ici^enhaner csl arrived 

 an m('mc idsnllal. \\)ves avoir (N'moiilir, (pie hss jcniics lolliculcs dc de Craaf 

 clicz Toisean sonl (■oinph'tcnicnl i(lcii[i(pics a ccnx dcs mamniilcrcs, le savaiil. 

 lirolesscnr d'hhia (hiKil, ropiiiioii (pTil iTcxisIc anlonr des jeuiics (nil's iuicimc 

 iiiemltraiic el ipic ceiix-ci sonl de siin|)le.s glolx^s |trol,oplasniali(jUCS a noyau. 



