96 K. H. ;i, A B H JI, B I, 



nepBHiaoe nojioaceHie nepHKapAia Sbijio cnpaBa ort Ae*HHHTHBHaro uejiOMa,a y Pterobranchia — 



Hao6opOTl, CJTEBa. 



CoiJiacuo eucKazauHoii iunome3ib napuaio npoucxooicdeuin nepwcapdin y npednoez nrnxn 

 u dpyiuxz, drbAo o6zticHfiemcH maKUMh o6pa30Mt, nmo es daAbumiweu deoAWu/m y Pterobranchia 

 ampofiupoeaACH npaeuu nepuKapditl, a y Enter opneusta, Hao6opomi>, Anebiu. 



Bo3MOJKeHi, BnpoqeMi), h Apyroii BsrjaA'b, a nuieHHO, ito o(5a nepHKapAia cjihjihcb bt> 

 oa0bt> HenapHBia MeAiaHHBifi mbidoki. 



Mop^ojiorH^ecKoe SHa^eme nepmeapflia. 



Bt. npeABuymefi r.iaBt 6bijo AOKa3aHo, qTO nepHKapAia He Momevb 6bitb npHpaBBflBaeMT. 

 .teboh hjih npaBon noJiOBRHB nejiosia xo6oTa, peAyn,npoBaBiueHCH ao CTenean He3HaqRrejibHaro 

 ny3bipBKa. nepHKapAia npeAcraB.ii Herb n3T> ce6a ab origine, Bipoamo, napnoe oopa30BaHie, 

 npnieniT) KaatAan nojiOBHHa 3Toro opraHa caMOCTonrejibHo 0Tin,euiajiacB ott> cooTBSTCTBeHHoa 

 nojiOBHBbi n,ejiOMa. KaKoe Mopto-floraqecKoe 3HaqeHie 3Toro opraHa? 



HcTopia pa3BHTia nepHKapAia noKa3biBaeTT>, q-ro 3Aicb Mbi uaxoAnarb oopa30BaHie tomo- 

 jiornqnoe, Hanp., nepnKapAiio Molhisca, cpeAH KOTopbLYb BEKOTopbia *opMbi oSjiaAawrb CHMMe- 

 Tpaquo pacnojioateHHbiMH AByiua nepnKapAiajibHbiMH ny3bipbKaniH. Ecm y 6ojibiunHCTBa mojuo- 

 ckobb nepHKapAia h nenapHbrii, to ncTopia pa3BHTia roBopnrb 3a to, qTO sto BBJieHie Bropnq- 

 Hoe — y 3apoAbiineH HtKOTopbix-b Lamellibranchiata n Gasteropoda, od.iaAaiomnxTb bo B3pocjiOMT> 

 cocToafiiH HenapHbiMT. uepBKapAienri, 3tott> opraei> noaBJiaeTca bi bhae AByxT> ny3bipen, h3t> 

 KOTopbixi. bhocjieactbih *opMHpyeTca OAHH-b HenapHbifi. 



Eme bt> CBoeM^ npeABapHTejibuourb coo6menin, roBopa o Mop*ojiorin nepHKapAin Eutc- 

 ropneusta, a yKa3ajn ua cxoactbo 3Toro opraiia Cb KapAio-iiepnKapAieM-b Tunicata (Dawy- 

 doff, 02). Ha TaKOBoe cpaBHenie mchh HaBeJin H3CJifcA0Banin B. B. 3ajieHCKaro HaAT> crpoe- 

 HieniT) nepHKapAia h cepAUa y Oicopleura vanhoeffeni, o KOTopwxx oht> AOKjiaAbiBaxb ua XI 

 ci , B3A'fe EcTecTBOHcnbiTaTejiefi n Bpaqea b-b 1901 r. Ha cxoactbo Meaay sthmh opraHawH y 

 Enteropneusta a Appendicularia yKa3biBaxb bi to BpeMa a B. M. LHuMKeBaqi.. 



nocjcfe noHBJieHia Moefi 3aMiTKH bi Zool. Anzeiger, ct> aHajioraqHOH rHnoTe30H BbiCTynajn. 

 PaTTep-B (Ritter, 02). 



ToMOJioria MeacAy KapAio-nepHKapAieiirb Euteropueusta n cooTBBTCTBenHbiMH oopa30Ba- 

 HinwH y Tunicata necoMUEHna, ao Bonpocb ae HacTOJibKo cxeMaTnqe.ni, KaKT> sto Ka3ajiocb 

 MH'fe h UlBMKeBHqy. 



,3,'BJio bt. tomt>, qTO KapAio-nepHKapAiajibHbiH annaparb Tunicata OTJinqaeTcn qpe3Bbi- 

 qaanofi cjomHOGTbK). 



OTHomeaifl MeacAy cepAaeMii a nepHKapAieMT> y Oicopleura 0Ka3ajncb He TaK-b npocTbi h 

 cxeMaTHqabi, k&ki, MoatHO 6bno cyABTb no nepBOMy AOKJiaAy 3ajiencKaro. Bcaopt noaBMHCb 

 ero 6o.ibmia CTaTbn 06^ aHaTOMin anneHABKyjiapin, bt> KOTopbixi, Mea?Ay npoqHMT>, aBTopi> 



