128 
. Actinopteryg II. 
Chondrostei: Bn uepenb oueHB Maao xpmneBbixn KOCTen; kocth 
uepena, raaBHHMn o6pa30Mn, Koamaro npoHCxoac^eHiii; supraocci- 
pitale h symplecticum He OKOCTeHlmaiOTn. nepBHUHbiH naeueBoiî 
noacn He OKOCTeHbBaeTH. Ectb clavicula (infraclavicula) h 
cleithrum. Hyomandibnlare Hasa^H 6e3H OTpocTKa ;n;aH couaeHeHia: 
ch operculum. Radii branchiostegi, ecan ohh ecra, He npHKp'b- 
naaiOTca kh epihyale h ceratobyale. Epionraue naaBHHKH, pac- 
nojioaceHHLie Bcersa na 6piox^, 3a rpyftHbiMH, hmEioth xoponio 
pa3BHTtia radialia. Bn cnniiHOMn h aHaaBHOMn naaBHHKaxn uhcho 
ayuen (koschhxh) boannie uncaa radialia; radialia Bn Tpn pa^a, 
ho xopomo pa3BHTH tojibko ;n;Ba npoKCHMajiBHHXH pa^a radialia. 
Xboctoboh naaBHHKH reTepon;epKaaBHbiH (y HCKonaeMbixn 6 h- 
BaeTH h ^H(|)Hn;epKajibHHH). Xop^a coxpaHaeTca eh Teueme Bcen 
HCH3HH ; BepxHia h HHacmn syrn xpamoBLia. naaBaTeaBHHH ny- 
3Eipb Bcer,n;a coe^HHeHH ch nnmeBO^OMH. Cnnpa jibhhh KaanaHH, 
apTepiaaBHEiH KOHycn h 3pHTejiBHaa xia3Ma Bcer^a ecTB. IlepH- 
Kap^iajiBHaa noaocTB coo6m;aeTca ch noaocTBio TÉaa. 
Teleostei: Repeijn xopomo oKOCTeHlmaeTn xpam,eBHMH ko- 
CTaMH. Symplecticum, ecan oho ecTB, OKOCTeH^Bmee. üepBHHHHH 
naeueBOH noacn OKOCTeHlmaeTn. Clavicula OTcyTCTByeTH, clei- 
tbrum ecTB. Hyomandibulare Ha3a^H ch otpoctkomh ^aa couae- 
HôHia ch operculum. Radii branchiostegi ch^hth Ha epihyale h 
ceratobyale. BpiomHEre naaBHHKH 6e3H radialia nan ch HeMHoro- 
HHcaeHHBiMH 3auaTOUHBi£m: radialia. Bh chhhhomh (nan bh cïïhh- 
hïïxh) h aHaaBHOMH naaBHHKaxn Kaac^oe radiale HeceTH no 
o^HOMy KoœHOMy ayuy; xopomo pa3BHTH ToaBKO o^hhh, npoKCH- 
MaaBHiifi pa;n;n radialia. Xboctoboh naaBHHKH roMon;epKaaBHEiH, 
^H$Hn;epKaaBHBiH Han yKopoueHHO-reTepon;epKaaBHBrH. II 03 B 0 - 
hohhhh CToabn 6oahe Han Memèe noaHO OKOCTeHlmaeTn. IlepH- 
Kap^iaaBHaa noaocTB He coo6m;aeTca ch noaocTBio r rbaa. 
no BH'bmHeMy BH^y pyccxie npe^CTaBHTean Chondrostei (oce- 
TpoBHa, ceM. Acipenseridae) MoryTH 6 htb OTaHueHH oth Teleostei 
TaKH: 
a. T'Éjio noKpMTO naTi.ro pajcana kocthhhxt, nçHTKOBTb (myaeKT.): 
O^HEMT» CDHHHHMT., ffByMH ÔOKOBLIMH H jRByMH ÔpromHHMH (nO- 
ca’È.THie y B 3 pocjiHXT> 3 K 3 eMnjiapoBT> MoryTT. HeaocTaBaTt). Xboctt. 
He CHMMeTpnqHEiô. Chondrostei. 
aa. T r ÉJio HHKor.ua He dLiBaen, noKpHTO naTE.ro paaaMH atyaeKT». Xboctt. 
no BH r ÉmHeMy BH^y CHMMeTpnaHLiH. Teleostei. 
