104 K. H. JT.ABHJI.OB'L, 



Moe otl ae*pHAifl' 3to hh «no Huoe, Kain> sKTOAepMHqecKiii atrium, bt. KOTopbiii OTKpbiBaeTCfl 



HC<I>pHAiH *). 



Befe BbiuienpHBeAeHHWfl npeAnojiaraeMbia <i>HJioreHeraqecKia CTaAin pa3BHTia He«i>pHAiajib- 

 Haro annapaia Enteropneusta xopoino mojkho npocafeAHTb npn pereeepauin. 



BnpoqeMT., HHorAa h OHToreeeTHqecKia opraHoreHe3T> coxpaHaerb HeroMfeneHHbiMT. najiHH- 

 reHeTHqecKifi xoat. nponecca sbojuoiuh 3Toro opraea. 



TaKT., y B3pocnbixT. Ptychodera minuta BCTpfeqawTca HHorAa 3K3eiunjapbi, ocTaHOBHB- 

 mieca na CTaAin B, hjih C^HetpnAiajibHbiH annaparb HopiuajibnbiXT. ocofiefi 3toh *opMbi xapaK- 

 TepH3yeTCfl npHcyTCTBiearb oahoh jifeBoii nopbi — CTaA. B). 



K*b Bonpooy o Mop<f)OJiorra ,n;op3ajiBHaro HepBa BopoTHHKa. 



HepBHaa TpyftKa BopoTHBKa Enteropneusta — ea rnerojiornqecKoe dpoeHie h nojioaceme 

 Ha cihihhoh CTopoHfe a^HBOTHaro, cocTaBJiaerL OA^H^ n3T> rjiaBHbixT. apryiueHTOBT. bt. nojib3y 

 Teopin npHHaAJiejKHOCTH Enteropneusta kt> Tony Chordata. 



TojibKO IIJneHrejib BbicTynHJiT. nporaBT. *roro TOJiKOBaHia, KOTopoe npnAaert Gojimuhh- 

 ctbo aBTopoB-b BopoTHHKOBOMy HepBy, pa3CMaipHBaeMOMy 3a ucmipaAbnyio Hepeuyw cucnieMy 

 Enteropneusta. 



3tot"l aBTopT> He npHAaen. 3Haienia TOMy oScToaTejibCTBy, ito yKa3aeHbiii opram. HMfeerb 

 bt. 6ojibuiHHCTB , E cjiyiaeBT. BHAt TpySqaiaro o6pa30BaHia, nojryqnBinarocn nyTeMT. HHBarHHauin. 



TjiaBuoe Bospaaceme IHueHrejiH coctohtt. bt. tomt., qio, no ero HaSjnoAeaiaMi., eme 

 3aAOJiro ao o6pa30Baaia nepBHon Tpyo"KH BopoTHHKa, BopoTHHKOBbiS HepBT. yace Bnojmfe AH**e- 

 penuHpoBaHi, cociaBJiaa oaho HenpepbiBHoe nfejioe ct. HepBHbiMT, Aop3ajibHbiMT. TaateMi. Tyjio- 

 Bnma. IIorpyateHie yqadKa BopoTHUKOBaro nepBa noAT. vomy h o6pa30Bame Tpy6KH ecTb 

 TaKHMi. o6pa30MT., no ME'Euiio LUneHrejia, HB.neHie BTopnqaoe, HenMfewmee Mop'i'OJiornqecKaro 

 3aaieHia. 



Moh Ha6^K>AeHia BnojiH'fe corjiacywTca ct. HaSjnoAemaMH IHnenre.ia— npn pereHepanin 

 3aAOJiro ao nponecca HHBarnHanin, na cnHHHofi CTopoHfe HOBaro BoporHnna o6pa3yeica HepBHbiii 

 Taavt, rncTOJiornqecKH HHqfeMT. He oumqaioiiriHCH otb HepBHaro yrojnneHia TyjiOBHurHofi o6jacTO. 

 Ha AaJibHfeHniHxi ciaAiaxT. Mbi Ha6jnoAaeMT. norpyateme 3Toro BopoTHUKOBaro yqacTKa HepBa 

 hoatj Koaty BMfecrfe ct. npnjieraioninMH yqacraaMH nocjifeAHeS (He BiwfeiomHMH npn3HaKOBT> An**e- 

 peHn,HpoBKH). 



TaKHMi. o6pa30Mi» TOJibKO HHatHaa qacTb o6pa30BaBmeHca HepBHofi TpySnn npeACTaB.naerL 

 H3T. ce6a AH**epeHU0poBaHHb]H HepBT,, ocTaibHbia ace npHJierawnya qacTH uepBHofi Tpy6KH 

 ecTb hh ito HHoe, KaKi. THHHqHbifi yqacTOKi. KoacHaro cjioh, coxpaHaiomiH BpeRieuaMH HaBcerAa 

 cboh rHCTO^orHqecKig habitus HopMajibHOH sKTOAepiMbi (cm. pnc. 55, CTp. 63). 



1) ToMoaora stomj o6pa30uaHi"io, b^pohtho, Hy*HO I MOHteTt bt. 3aiaTid; nepndpaHxiajibHofi bojiocth Amphi- 

 HCKaTb bt> atrium Bryozoa Phylactolaemata, a 6biTt I oxus. 



