HABJIIOAEHW HAA'b nponECCOMT. PErEHEPAlHII Y ENTEROPNEUSTA. 99 



nepn*epin KpoBeHOcnaro CHHyca Tornaria krohni KjrfeToiHi,ie 3.ieMeHTM — h Ha3MBaere> hxt, 

 KpoBeHOCHbiMH TBJibu,aMH, CTaBH, BnpoqeMT, (hto xapaKTepHo), Tyre. >Ke 3HaKb Bonpoca. B3T- 

 coh-l (Bateson, 86) Toace, noBHAHMOMy, Ha6jnoAajn> KXETOHHyio BMCTHJiKy ccpAeqHOH JiaKyHbi 

 y B. kowalewskii kg. 



H ne Mory yrBepAHTejJbHO CKa3aTb, KaKoro nponcxojKAeHia sjieMenTM, oopa3yioui,ie buo- 

 cjiiACTBin onHcaHHyw MivroqHyK) Tpy6Ky MeatAy nepHKapAieM-b n hotoxopaoh. Bo bcbkomi, 

 cjiyia-fe 3HTOAepMa (HOTOxopAa) yqacria bt, hxt. oopasoBaHin ne npnuHMaere.. 



Bo-rfce q-BMi, B-fepoflTHO, qTO 3th kji^tkh npeACTaBJiaroTb n3T> ce6a rh Me3enxHMaT03Hbie 

 9JieMeBTbi, KOTopwe BcerAa njaBarorb m, SjiacTon.eji'fe MeatAy hotoxopaoh h uejiOMaMH xoooTa. 



HTaKi, Hi-re. nnqero HeB-fcpoaTiiaro bt> tomt,, hto 3A"fccb mm miiem, roMOJiori. siiAOKapAifl 

 cepAHa Vertebrata, a cjrkAOBaTejibHO, onpeAi-ieHie lanra (Lang, 02) Tepaere. cbok> KaTe- 

 ropnqaocTb. 



MeHa nHTepecoBajn> Bonpoci, cymecTByioT-b jih y Pterobranchia Ha BHyxpeimeH noBepx- 

 hocth cepAHa ocxaTKH KJif>ToqHaro SHAOTejria, KaKT>3TO BpeiueHaMH naSjuoAaeTca y Enteropneusta. 



Ha 3TOTB cqere. mm HMieMt i<oe Kama yKa3aHia bt> pa6orE JU,enoTbeBa (IHenoTbeBt, 

 07), OTHOCHTejibHO Cephalodiscus dodecalophus. «Bt> nciocTH cepAua, cnnycoBi hjih cocyAOB%», 

 BCKOJib3b 3aMf>qaeTb aBTop-b: «JiHmb oqenb pfeAKO mojkho 3aMT>TnTb oco6bin euympeuuia KAnmKuv 1 ) 

 (dp. 130). 



9th mtVtkh, noBHAHMOMy, BHorAa o6pa3yiOTX cnJiouiHyio BMCTHJiny BnyTpn KpoBeHOCHbixi 

 CHHycoBi. TaKi>, Ha oahomtj H3t> pHcyHKOBT> LLI,enoTbeBa, HJunocTpnpyK)m,HX'b ero npeABapn- 

 TejibHoe cooSmenie o Cephalodiscus (Schepotieff, 05) HSoSpaaceHT. anAOTejiifi, BbiCTHJiawmiii 

 BeHTpajibHMH CHHycx (T. I fig. 3). IIoBHAHMOMy, noAo6HMH ate 3HAOTejiiH HaojiOAajn, h AnAep- 

 coht> (Andersson, 1907) bt. cepAH'fc Cephalodiscus, HafiAeHHbixx LIlBeACKon IOmHO-nojapnoH 

 9KcneAHii,ieH, xoth ero yKa3aHi'a Ha 3Tore> cqere> oqeHb HeonpeA'fcjieHHM. 



Enie MeHie Aaere. HaMi. bt. 3tomt> OTHomeHiH pa6oTa PnAByAa (Ridewood W. G., 

 1907) OTJinqatomaaca kt> TOMy He qepe3T> qypi. cxeMaTnqHMMH pncyiiKaMH. 



Kte Bonpocy o xopfl'fc Enteropneusta. 



Ecjih HCKaTb y Enteropneusta roMOJiora xopABi Vertebrata, to, pa3yMieTca, ecrecTBeH- 

 nfee Bcero oSpaTHTb BHHinaHie Ha toti, JKejioSotn,, kotopmh y hekotopmxt, npeACTaBHTejien 

 rpynnbi TAHeTca baojib nnmeBOAa iia BceMi. npoTaateain BoporanKa. 



2Kejio6oK/b 3TOTL ecTb o6oco6BBmaacH qacTb BepxHefi ctehkh nnmeBOAa h qpe3BbiqaiiH0 

 HanoMHHaere. paHHia CTaAin 3aKJiaAKH xopAM y 3apoAbiuieH hh.3uihxt> Vertebrata. 



9to o6pa30BaHie, t. na3. nSupraoesophageal notochord», KaKi. H3BfecTH0, 6buo BnepBbie 

 OHHcaHO Kitter'oMT, y Harrimania metadata, iiocjib qero ero npiicyrcTBie AOKaaano 6mjio y 

 n-BKOTopbix r b ApyrnxT. Enteropneusta (H. huppferi, Saccoglossus mereschkowsMi). 



1) KypcHBi. mom. 



13* 



