10 



E. H. /UBHflOBT), 



4io6bi OKOHiaTejibHO yo-feAHTbca bi tomt., mo Enteropneusta bi o6biqHbixT> yoioBiax-b 

 repawTi 3aAHie yiacTKn TyjioBnma, a AOCTaBajn, co AHa mopa pyKaMH, 6"e3T, noiwoiuH Aparn, 

 Ty TpaBy, ta'B atHByrb Enteropneusta, co BceB03MoatHbiMH npeAOCTopoatHOCTHMR pa3f>npajn> ee, 

 h bt> pe3yjibTaT'b BcerAa OKa3biBajiocb, qTO He 6ojite 2% HanAenHbix-b whbotbwxi 6buin 

 BnojiH'B rrfejibi. OcTajibHbiH SbiBajin 6e3T> XBOCTOBbix'B ynacTKOB*. 



O^eHb p^ako, HaooopoTi, 



CJiyiaJIOCb MHt HaXOAHTb 3K3eM- 



njiapw ct> oTopBanHbiMH nepeA- 



JIHMH KOHUaMH. H3T, MHOrHXT. CO- 



Teni 3K3eMnjmpoBi, 6'biBuiBX'b bt> 

 mocmtj pacnopaaceHin, a Bcero 

 pa3a ABa naxoAH.ii TannxT. atn- 

 BOTHbixi,, y KOTopbix^ nepeAHaa 

 qacTb HaxoAH-iacb bti nponecct 



B03CTaH0BJieHifl. 



TaKHMi o6pa30M"L Ptychodera 

 bt> npnpoAHbix-b, HOpMaJIbBblXt 

 ycJioBiflxt nouma eceida mepmotm 

 3aduiu kohcuz mrbm u novma 

 HiiKOida ue mepswmz nepednmo. 

 CorjracHO Bsr-nHAaMt Benc- 

 niaHa, mm AOJiatnbi 6biJiH 6bi 

 BMiTb y Enteropneusta npeBO- 

 cxoaho BbipaateHHyw cnocoSHoerb 

 kt> pereHepanjn 3aAHaro KOHna n 

 oTcyTCTBie pereHepauin Ha ne- 

 peAHenii.. 



Ha caMOMi me A'feJ'E mbi Ha- 

 xoahmt> coBepraeHHO o6paTHoe. 

 y Ptychodera en ydueumcAbnow Jiewocmbw petenepupymnz nepedma, uacmu mn>.<ia, idtb 

 6u hu Gum npoii3eedeua aMnymcmia, na 3adueMz owe Konun uacnionv^eu peienepcmiu ue m6AW- 

 daemca eoece — npoucxodwm Auutb 3aoKuejienie pamt. 



Ecjih nepepi^aTb atHBOTHoe bt> H-fecKOJibKHX-b M-fecTaxi, to Kaaubiii KycoKT> pereHepnpyerb 

 bcb HeAOCTaK)u;ifl nepeAHia qacTH rfejia, Ha 3aAHen ate qacTH KycKa HaSjuoAaroTca Jinuib o6m,ie 

 npon,eccbi nepBHqnoH peryjiaijiH, bt> pe3yjibTarE KOTopbix% crfeHKa KHineiHHKa cpacTaeica ct> 



3KT0AepM0@. 



Ecjih, HanpnivrEpi, nepepfeaTb atHBOTHoe ta^ HH6yAb bt> BepxHen qacra acaSepHaro 

 OTA'BJia h bt> o6jiacTH roHaAi, to Ha nepeAHeMt kohite o6pf>3Ka o6pa3yeTca h xo6oTb h BopoT- 

 hhkt>, Ha 3aAHeMi, ace pereHepanJH He npoH30HAerB — ajHBOTHoe OKpyrjiHT-L noBepxHOCTb paHbi 



Phc. 2-h. CxeMa ,Mfl noncHeHin ofimaro x<wa pereHepauiii npii pa3- 

 jihhhuxt. caoco6ax'b aMnyTauJH Ptychodera. 



