70 K. H. ,H, A B H £ B t, 



p,emu HaAi. nponeccoM-B AH^'epennnpoBKH rojiOBHoro ny3Bipa. He AaioTi hhiokhxi yKa3aniB 

 Ha 3TOTL cqeTt h bcb ocTajitHbie H3Cjr£AOBaTejiH, H3yqaBmie Tornaria (Weldon, Ritter, 

 Willey, Bourne n AP-)- 



HiaKt, roBopHTb bt> HacToamee BpeniH o HenapajuiejiH3M r B Me>KAy nponeccaiun perene- 

 pan,in h OHToremn npHirEHHTejiBHO kT) AaHaoiuy cjiyqaio, t. e. cnocoSy pa3BHTia nejioma xo6oTa 

 y Ptychodera, no Meebinen Mtp-B npeacAeBpeMenno, Taia, Kaicb mbi He 3HaeMi> nona, KaKHMT> 

 nyieiu't pa3BHBaeTca nejionraqecKaa nojiocTB xoSoTa stoh <i>opMLi npn 3M6pioeajibHOMT> pa3BHTin. 

 BnpoieMb, earn 6bi Aaace h Bbiacnnjiocb, qTO npn 3M6pioHajibHOMi> pa3Bnrin xoSothoh nejiourb 

 o6pa3yeTCH y Ptychodera minuta h3t> nepBBiHaro KHineqHHKa, hoao6ho Toiuy, Kairb 3to HMierb 

 mbcto y Balanoglossus Jcowalewskii Ag., to n TorAa, MHB KaaceTca, Cb npnHnHniajibHoii cto- 

 ponbi HtiT r b ocuoBaniH BHAtTb bt> oSohxt, cnocoSaxT) o6pa30BaHia nejioiua npn pereHepauin n 

 OHToreHe3fe — CTOJib rjiyo"oKoe pa3Jinqie, Kaicb sto A^-iawTi Delage n Herouard. Ilo hxx 

 MHEHiw, ocHOBaHHOMy Ha BbimeiiETnpoBanHOM'b 3aMf>qaHiH IHneHrejia (cm. dp. 5), nejiOMflqe- 

 CKaa nojiocTb npn pereHepan,in «est oblige de reformer aux depeus dhm feuillet different de 

 celui, qui Va engendre cliez Venibryon» (cip. 53). 



Mbi BHA'fejiH, qTO npn pereHepanin HeJiOMi> xoo"OTa Seperb uaqajio H3T, sjeMeHTOBt uejioMa, 

 t. e. hhwmh cjioBaMH, noBafl Me30AepMa o6pa3yeTca h3t> cTapon »ie30AepMbi. 



nepnxaMajiLHBia hojiocth. 



3M6piojiornqecKifl AaHHbia o pa3BHTin sthx'b o6pa30BaHw AOBO.ibHo cKyAnw, uo AocTaToquo 

 onpeA'BJieHHbi. 



Koe KaKia AaHHbia mbi HaxoAHMi y Es-rcoHa (Bateson, 85, CTp. 97, 108, fig. 28, 

 Tab. 6), ho ero na6jnoAenia na dTOTb cqerb Aarorb Majo *aKTnqecKaro MaTepiajia. 



y 3apoAbiuia nepHxajiajibHbifl HOJiocTn hohbjihiotch aobojibho pano — Bstcoht, KOHCTa- 

 TnpoBajiT> hxt> npncyTCTBie y 3M6piona Ha cTaAin Bcero 1 napbi acao'epHbix'b mejieii. Onn 

 o6pa3yK)TCfl bt> BHA'fe AByxT> arfenbixi BbinflqnBaHin CTf>eKn nejioiia TyjiOBHin,a, BpocTawuiaxi 

 BiiyTpb BopoTHHKa. TaKOBbi nenocpeACTBeHHbia Ha6jnoAeuia Moprana (Morgan, 92, crp. 427). 

 Toqno TaKHMi me cnocofioM-b o6pa3yioTCfl nepnxsMajibHbiH hojiocth h npn pereHepanin 

 (pnc. 24 h 25). 



HHTepecubi HEKOTopbie npenapaTbi BsTCOHa, H3o6pa;KaeMbie hwb Ha pnc. 28, Tab. 6. 

 CyAH no 3thmt> npenapaTamt, nepHxsiuajibHbiH nojiocTH 3apoAbima oopa3yioTca HHorAa na cqen, 



H,eJIOMa BOpOTHHKa, OTIHHypOBblBaHCb KaaCAMH OTT> COOTBtTCTBeUHOH HOJIOBHUbl UeJIOMUqeCKOH 

 nOJIOCTH Iia CHHHHOH CTOpOHt BAOJIb MeAiaHHOH JIHHiH. 



BstcohT) B-b 3TOMT) HMeuHO cMbicjife h TOJiKyeTi. cboh npenapaTbi (crp. 97), npHCaBJiaa, 

 BnpoqeM'b, mto cyAb6a sthxt> o6pa30BaHiH eniy He cobcemt. acHa. 



H yace ynoMHHajx, hto h-bhto noAo6uoe yAajiocb Ha6jnoAaTb h mh-b npn pereHepauie. 

 H'BKOTopbie npenapaTbi AaiOTi bosmohhoctb npeAnojiaraTb, rto nepnxsMajibHbia hojiocth o6pa- 

 3yioTca HHorAa nyTeMi> OTHj,enjienia ott. nejiOMHiecKHXTj nojiocren BopoTHHKa. Bnpoqenix, bt. 



