8 
KJrACOB Marsipobranchii. 
ninxT) jKaôepHtix^ ;nyrHhn>. ^Ka6pu MhmKOo6pa3HH:. ïïocoBoe 
OTBepcTie, KaKrb n opraH^ oôohrhlïi, HenapHoe, coeftHaaeTCH ca» 
rnno$H 30 H; oôoHRTejiBHEie HepBH napHtie. Opraat cjiyxa CTb 
oshhmtb min ^ByMR nojiyKpyJKHHMH KaHaziaMH. ApTepiajiBHaro ko- 
Hyca ahra; Boporaon CHCTeMti noneim h^tt>. Kame^HLiâ KaHajrb 
npaMOH, des't nanopanecKHX'B npaÆaTKOBTb, ôesrb no^JKejiyso^HOii 
^cejie3H a ceaesemcH. KjioaKH h'Ètt». üojiOBLTe opraHH aenapabie, 
0631 * BHBO^BIX'B npOTOKOB^b, nO-HOBEI© npO^yKTH BH^haaiOTCH Ha- 
pyacy npBMO H3T, noÆOCTH TÉJia âepesn iiojioblir OTBepcTis 1 ). 
Marsipobranchii pacnpocTpaHeHH br, nphcHHX'B BO^axT> 11 
Mopnxij npenMymecTBeHHO y MhpeHHuxrb nacTea chBepHaro a 
KacHaro aoRymapia. Bn ncKonaeMOMT, coctorhui HeH3BhcTHH. 
Pctlaeospondylus gunni Traquair 1890 HnRHeÆeBOHCKnx'B otjio- 
Rcemii ÂHrjiiH BHaaajrh bujnb npnHjrnb 3a npe^CTaBHTe jir Kpyrjio- 
poTHXŒ,; Tenept ace ero ckrohhli canTaTt caophe 3a jinnnHKy 
Dipnoi naa ace 3a npHMHTHBHy io pi>i6y, coBMhmaiomyio btb ce6h 
HhKOTopue npH3HaKH Marsipobranchii, Selachii h anaHHOK'B 
Dipnoi 2 ). 
a. CnHHHOH ILJiaBHHK'I» H6 o 6 oC 06 jieHB. ÜOJIOCTB HOCa H HOJIOCTB TJIOTKH 
jtpynE» ct> ji:pyroM , i, coo 6 m,ai 0 Tca. Potb CHaôœeHT. ycHKaMH. 3Ca6ep- 
Hua OTBepcTia OTHeceHtr aaaeKO Ha3a;nB otb rojiOBH h OTEptiBaioTca 
npHMO bb rjioTKy. r.na 3 B h'Étb. OTpaAB Hyperotreta. 
aa. Cethkhoh naaBHHKB o6oco6jieHB. üoaocTB HOca h noaocTB tjiotkh 
jipyrB cb apyroMB He cooômaroTCs. Potb 6e3B ycnKOBB. IKaôepimfl 
OTBepcTia .leæaTi, cefiiiacB ace 3a roaoBoS h y B3pocaHXB oTKpuBa- 
lOTca bb KaHaaB, npoxo^flin;iô noaB imiotroh. Y B3pocaBiXB rjia 3 a 
ecTB.OTpaaB Hyperoartia. 
Oxpafl-B I. Hyperotreta (Myxinoidei). 
2 ceMeficTBa: 
[a. Cb Kaacaoô ctopohbi 6—14 acaôepHHXB OTBepcTiij, BeaymnxB bb 6— 
14 acaôepHEixB m'Éhikobb .CeM. Eptatretidae 3 )]. 
aa. Cb Kaæaoft cTopoHBi no oasoMy acaôepHOMy OTBepcTiro, otb KOToparo 
nayTB KanaaBi kb 5—6 madepHBiMB M'ÉmKaMB . . . CeM. Myxinidae. 
1) AHaTOMiio cm. Lonnberg und Fayaro. Fische in: Bronn’s Klassen und 
Ordnungen des Thier-Reichs. Leipzig, 1901 sq. 
2) Cm. W. Sollas and I. Sollas. An account of the devonian fish, 
Palaeospondylu8 gunni Traq. Proc. Royal Soc. London, LXXII, 1904, p. 98. 
3) = Hcptatremidae = Bdéllostomatidae. 2 posa bb Thxomb oKeaHii n 
^acTBio bb Mopi y 10. A(£pHKH*. 1) Eptatretus (Dum.) Cloquet 1819 (= Homea 
