— 36 — 



UpOH3BOAHTl. HSt M03rOBOH TpyÓKH HOCJI-fe OTJt-fejieHifl CH OTt 9K- 



ToaepMR H Bt 9T0M'f> CMMCJi-fe TOJiKyeTt HaóJiEOjtema r e T T e. 



BeAO (29) Mscji-fe^tOBajn. pasBHTie HepBOB-L y TpHTOHOBt. 

 Ha TpeTiS ji^eiih iiocji-fe HCKycTBeHHaro omio^oTBopenia hsi. 3a- 



KpUTOH MOSrOBOH TpyÓKM Ha o6^ CTOpOHH llOflBJIHIOTCa KJI-feTO^- 

 HHe BHpOCTŁI, HG CTOamie BI, CBH3M C'B aKTOJl.epMOMT.. Hst HHKt 



pasBiiBatoTca nepBHŁie raHi^jiia h 3a;łeie KopeiuKH. 



CuencepŁ (30) nponsBOAMTi, nepBU jiaryiUKM M3'b rjiy5o- 

 Karo 3im;i,epMHiiecKaro (aepBnaro) cjioa. 



IIo^JKOHCOHy H inejiBH0Hy(31) y rpuTona (Tr. crl- 

 status) pasBHTie iiepn*epHqecKon nepstioS cucTeMŁi HaimHaeTca 

 noaBjrenieMt HepBiioii bojiockh no bcgh ;iJinirfe T-fejia. CiiHHHHe 

 H qepenHue nepse BwpocTaiOTi. m3t, otoii hojiockm. Y JiarymKH Bt 

 paHHiOH) cra;i,iH), BCJit^t 3a 3aMUKanieMT, HepBnoii rpyÓKH, TaKate 

 cymecTByeTi, nepBaaa iiojiocKa. 



JBuLiie ii,nTHpoBaHHHa H3CJi'feA0Baiiia (7) Bap^t paccpocrpa- 

 HHJit H Ha aMOHÓia. HaojiiOACHia ero Ha;!,'L aroii rpyiiuoił, hobh^ 

 jiiHMOMy, He 5łijim MHoroiincjieHHH M oco5eHHo yói^AHTejiLHhi h jiiJia 

 Hero, TaKt TaKT> ont ne npHBOAHTi. cooTB-feTCTByiomMKi. pncyn- 

 KOBt; OHH coBepuieHHO HpoTHBophiiaTt ojtHOBpeMCHHo iioqTH ny- 

 6jiHK0BaHHtJMT> Haó.lHOji.eHiaMt o Illy-iibae (32) na;!.!, Jiaryui- 

 Koii, HO KOTopoMy cHHHHwe y3Jii>i upoMcxoAaT'L H3'L nepH^epHiie- 



CKHZt ^aCTCH M03r0B0ii n.liaCTMUKŁI. 



B-L Bonpocfe o HauajiŁHOH ^H^^epeHHiHpoBK-fe nepH3>epHiiec- 



KOfi HepBHOH CHCTeMEJ, MŁI HaX0JIiHM1, y Ty CCC (10) ;ii0B0JILH0 



opHrHHajibHyio To^Ky sptnia. Ont, nojtoóno C u e h c e p y, CBa- 



3ŁIBaeT'B ee CB Jl,ByCJIOHHOCTLK) 9HH6jiaCTa. IIoCJlllJluiH B'L TMHHg- 



HOMt cocToaniH aBJiaeTca o^HOCJioiiHHMt, 3a HCKJiio^eHieMt nepB- 

 HOH oÓJiacTH, OTKyjta HHatHiii cjioh (neuroepitlielium), pa3pocTa- 

 acB HOCTeneHHO ho 6oKaMT>, a^cti, na^ajio cnHHHUMt KopeniKaMt 

 iiepenHHX'L m TyjiOBHU],nux'Ł HepBom.. Bt rojioB'fe HeMpoaiiMTejiiii 

 pacnpocTpaHaeTca CecTp-te, ^t^Mt Bt Tyj[OBHH],'fe. OT^t-fejiaacB OTt 

 napyaiHaro cjioa 9nH5jiacTa, OHt o5pa3yeTt K.rfeToiinyio HOJiocKy 

 HO Kpaio 3aMtiKaioui,eHca HepBHoi TpyÓKH , a noHMiKe — TaKJKC 

 yTOJiHi,eHie ;i;jia tiepeHHtixt raHrjiieBt (1. c. fig. 31; rp., cg.). lipa 

 saMLiKaniH nepBHOH TpyÓKii ;!iiB'Ł napHŁixt HeiposHHTeJiiajrBHŁiKt 



