KT L\ SUINIIfCVTlO^ l)E I/OEIF. 2ri5 



L-. cicnlncnlc, on (•(X.cl.c |.n.lii,M'iT dc r.r.if dc In poiilo, .-oinnHMKr a 

 siihii' Ic phriioninic dc la sc-inciilalioii , adssilMl (|u"il rsl arriv.' dans ccllr 

 |)arli(> (Ic roNiducIc, (m"i Ics iiiciMhraiics ('()(iiiilli(Mrs con.ii .riil a s<> (ov- 

 um: La s(-rii(Milaliou s\)|)m' par la lormalioii dc sillons sr comikmiI a aiii^Ir 

 droit el diMsaiil sii(T(>ssi> oiinil la cicalricido en dn.\, (pialir el ImJl sc- 



riK'lils, ayaiil clianin i loriuc Iriaii-nlaiir. T(.ii.s <'(.s lriai)-l.-s oiil Iciir som- 



„H.| |)la(r an crnhr dc la ncaliicnhs rl I.hm's axes ra>onii(Mil a parlir dc c- 

 ,,oi„| rcnlral. A n- nioniciil il m.|»''''<' ^•■|•^ ''' sonnncl dit liian-lr nuv s.rlioii 

 a.Naiil |.oni- irsidlal (risoh'r an (tiiIiv d.- la cicalnCidc hinl jK'lils -lohcs 

 ,,0(n'vns charnn (Pnn no^an. Lcs s<>i;iuciils vuu\huwu\ a sc dniscr par drs 

 silN.ns diri-rs dans l(- sens <ln ra\on i\r la ciralricnlc, el bi.Milol niic 

 dcnxiniM- el pnis nn<' Iroisinno scrlioii s-opnrul an\ drpcns do la parlio (vii- 

 lral(- d(" (Tss(-incnls. Lc nond.rc drs p.-lils -lolx-s (pii sc rornirnt an nMihr 

 d,. I;, ciraliaCnl.' ani^nniilc done rapidcnuMi! , el il csi a irntanpicr (pn- Ions 

 CCS -lohcssonl ponr\ns iPn )an parCailcincii! <lisliiicl. 



Iv pli.'im.ncnc sc couliinic dc la nicnic inaiiicr(> cl Ics prcnncrs -lohcs 

 ccniranv sc inidlipliani par division, il arri\c nn nioincnl on la cicalricidc 

 priini(i\c s'csl (raiisforincc en nnc inlinil/' dr pciils i;lol(cs (pn' sonl anianf 

 (\c ccllnlcs dislinclcsclconslilncnl la prcnn-crc lame ccllnlairc <lc r(Mnhr>on, 

 Ic Maslodcrnic. 



Lr (raclioinicnicnl dn \itcllns cl la lornialion dn Idashulcr s\>pcrciil a 



pen prcs i\r la nicinc inanicr.' chcz l.'s Ccplialopodcs; scnlcmcnl , dcs l(> d.'l.iil 

 1;, cH.clic pron>'rc > csl pins cl.ari^V'c dVlcnicnls nnlriiirs (pic la cicalricnic 

 dcs oiscanx; cl, laiidis (pic clic/, Ics ^crh'liirs la cicalricnic cxisic d(;ia dans 

 r(cnro\aricii, lHcna\aiil la IV'coiidal,i(Mi , cllc irapparail (pfapn's la l(T(M.da- 

 (ioi, rhc/ Ics <:(>plialopodcs (Kollikcr). Kcs -Nd.cs ccllnlaircs (pii sc lornicnl 

 an ccnirc dc la conclic, pai' scclion dc la ptmilc cciilralc dcs sc-iiicnis Iriaii- 

 -nlaircs dispos('-s cii ra)ointanl, soul prcs.pic cvclnsivcinciM lon.K's dc iiia- 

 li("MT prol(.plasniali(pic. I.cs sc-incnis pcidciildoiic pen a pen loni lenr prolo- 

 pjasnic, (pii csl cniploNc a lorin.'r ics ccildlcs dn .riilrc, cl il arriNC nn nioinciil 



on ils lie sc conslilncnl pins (pie dVIe iits nnlrilils; alors ils sc londenl Ics 



nns dans Ics anires pour s'niiir an rcsic dn dciihiplasfiie, (pii coiislilne Ic 

 janne propreincnl dil. 



