HAEJIIOAEHIH RARb nPOUECCOMt PErEHEPAHM y ENTEROPNEUSTA. 73 



bopohkb, KOTopaa Hep-feAKo npeBocxoAHo BbipaateHa bt> mojioaomt, pereHepHpyrcmeM-b xooorfe, 

 aBTopti, H3cxfeAOBaBinie npoueccb 3iu6pioHajbHaro pa3BBTin Enteropneusta, m onHCbiBarorb. 

 OqeBHAHO, BopoHKa 3Ta npn OBTorene3-B He noaBJiaeTca, Kan* ee 6biBaen» OHa 3aqacTyw Bbipa- 

 ateHa n npn pereHepanja. 



Ho MHt KaaceTca, qTo tot-l cnoco6i> AH**epeHUHpoBaHia He*pnAia, Kor^a Ha pa^y ct> 

 3KT0AepMajibHb]Mi KaHajioMi, noHBjiHeTca HacToamaa nepnTOHeajibHaa BopoHKa, AOJiaceHi 6biTb 

 pa3CMaTpHBaeMT,, Kani nepBHqnbiH. Bt> noAoOHOM-h aBjiemn a Bnaty npoaBJieHie aTaBH3Ma, o 

 qesn. eme 6yjiftrb p-feqb BnepeAH. 



IlepeflHaa h sa^Haa KHnraa. Pot^ h anus. 



KaKi Mbi BHAtjiH, npn pereHepauin Ptychodera HHKorAa He o6pa3yeTca 3KT0AepMHqecKHxi> 

 stomodeum'a n proctodeura'a. Y peieuepupomewuxz oco6eu eech nuwemum un>AUKOMz dumo- 

 depMajibmio npoucxoowdeuia. 



Oopamaacb Tenepb kt> 3M6piojiornqecKOMy MaTepiaJiy ajih cpaBHeHia, Mbi HaTajiKHBaeiwca 

 Ha 3eaqnTejibHbia TpyAHOCTH. 



IlpepoAa nepeAHaro n 3aAHaro yqacTKOBT> KHmeqHOKa B3pocjiaro atHBOTHaro — eABa jih 

 He caMbifi cnopHbiH Bonpocb bt. Moptojiorin Enteropneusta. 



y Tornaria acHO pa3JinqHMbi xpn OTA^ja KHiueqHHKa — ecjin cyAHTb no BHtmHeMy BHAy h 

 npn stomt. cpaBHHBaTb TopHapiw ct> aHajiornqHbiMn jinqnHKaMn aHHejiHA't, hjih HiMOKoatHXT,, to 

 mojkho 6bijio 6b\ npeAno^araTb Hajinqie y eea THnnqHbix'b 3KT0AepMajbHbiXT. stomodeum'a h 

 proctodeum'a. 



Ha caMOMi ace ae-h* Bonpoci oSctohtt, ropa3Ao woatute. npeatAe Bcero, ecin npeAnojio- 

 ffiHTb, qTo nepeAHaa KnmKa Tornaria sKTOAepiuajibHaro upoHCxoatAema, to npHAeTca h ata6ep- 

 nyio ofijacTb B3pociaro Balanoglossus othccth kt. SKTOAepiu'E, qTo BpaAT> jh B03MoatHo. 



Bnpoqeiwb, 3to oScTOHTejibCTBO He moimo 6bi cjyatHTb AocTaToqHbiurb ocHOBaHieurb kt> 

 TOMy, HTo6bi 0TKa3arbca npa3HaTb b% nepeAHeMi> yqacTK-fe KHmeqHHKa Tornaria 3KTOAepMHqe- 

 CKoe o6pa30BaHie. 



Topa3AO BaatH^e BTopoe coo6pajKeme. Hmchho, npHHHMaa HajinqHOCTb y Tornaria 3Kto- 

 AepMajrbHbixt proctodeum'a h stomodeum'a, mh AOJiatHbi 6him 6bi npn3HaTb, qTo KHineqnnK'b 

 Tixi) *opMT. Enteropneusta, KOTopbia pa3BHBaiOTca ct> MeTaMop<i>030MT., coBCEM-b HHaqe no- 

 CTpoeHii, qtMT. y t-bxi Enteropneusta, KOTopbia He nintHm. JinqHHoqHbix'b popart h pa3BHTie 

 KOTopbixt coBepmaeTca npaMbiMi> uyrewb. Bee a^jio bt> tomt>, qTo nponcxoacAenie nepeAHeo 

 h 3aAHefi KHinKH Tornaria Hawb HensBtcTHO, npu pa3eumiu owe Balanoglossus kowalewskii eect 

 Kumenuum o6pa3yemca U3n dumodepMbi. y stoo *opMbi ii-eti Aaate Hawena Ha 3KTOAepMajibHbie 

 proctodeum h stomodeum. TaK-b, h3t> o6cToaTe.ibHbix , b naSjuoAeHifi BsTCOHa (Bateson, 84), 

 BbiTeKaerb, qTo npn npaMOM-b pa3BHTin y B. kowalewskii Ag. porb o6pa3yeTca nyTeMi> npo- 

 CToro npopbiBa KemeqHOH Tpy6KH Hapyaty. «The foimation of the anus occurs rather later by 

 a perforation of the skin at the posterior end» (cTp. 212). 



3an. $H3.-MaT, Ot«. , 10 



