18 



A. BOPHCait'L. 



Bt> to a;e BpeMH sjGhoS aunapaxb iiHApHKorepifl, iiecoMnï;iino, npuiiaAJieîKurb npeAcxaBii- 

 tgjh) cemeiicTBa nacToamnx'b HocoporoB'b, Rlùnoceratidae : oxb Hyracodoniidae 11 orhAmyno- 

 dontidae ohï. oxjiiiqaexcfl cxpoemeMi. cBoero M 3 , a TaKHe ixfcKoxopbiMH ApyiiuiH npn3naKaMW 

 (cm. Aaiie). Ho cpeAH HocoporoB'b oui» BbiAB-iHercH neoobnaiiuo upHMnxoBiibiMii npn.3HaKaMH, m> 

 ocoôeHnocTH cbohxx. jOHînoKopenHbix'B u nepeAHiix'b 3y60B"b 1 ). 



KaK'b h3bx>cxho, AbeTeMb ycTanoBJienbi abx> rjuiBHLifl rpynnbi npHMiiTHBHbixb nocopo- 

 roBT>: y nepBoii M0Jiapn3aii,ifl JOïKHOKopeiiHbix'b ujifiTb cnepeAii na3aAT>, ott> P 2 kt> P 4 , y bxo- 

 poîi — oôpaxHO; nepBaa rpyuna pa3Biixa rjiaBHbiM'b oopasoiux. wb AiviepnK'E, — OAHaKO ne OHa 

 OAHa HCKJiioqHTeJibHO (KpoM't Hea hm'Bîotch taxi, nasbiBaeMbia «HexniiHiHbiH <i>opMbi» Osborn'a), 

 a BTopaa riaBHoe pacapocTpaeeHie hm'bgttj bt> Espont. 3xoxx> Bxopon uyTb MOJiapH3an,iH 

 ooHapyîKHBaioT'b xaKHie Hyracodontidac 0 Amynodontidae 2 ), m 110 axoiuy npn3HaKy iihaphko- 

 repin TaKœe npiiHaAJieîr.nx'b Bxopoô rpyrinE: xoxa hh oahhi, ns'b ero JioaîHOKopeHHbix r b ne oôHa- 

 pyjKHBaerb eme cKOJibKo miôyAi» 3aMtxuoii M0Jiapn3au,lH, ho P 2 necoMirhiiuo necerb 6ojt,e iipn- 

 MHTHBHbie npnsnaKif, tôwb P 4 , u oômeii CBoeii xpeyrojibHOH <i>opMon, h oxcyxcxBieivrb tetartocon'a. 



IlepexoAa xeuepb ub cpaBneniio ct> yme onncaHUbiivin upeAcxaBHxejiHMii ApeBHbBiHHX'b 



HOCOpOrOBT», OCXaHOBOMCH ÔOJTBe AeTaJlblIO TOJIbKO na Tpexi) <ï>opMaxTî. 



CpeAH aMepHKaiicKux'b nocoporoBx. caMOK) iiphmhxhbhok) i>opMOK) HBJHeTCH Trigonias s ). 

 IloAOÔHO HHApnKOTepiio, y nero hh OARii'b .lOJKHOKopeHHoii ne noABeprca 3aMkTH0H M0Jiapii3aii,iB; 

 o6m,ee oiepxaHie P 2 ao irÊKOTopoii cxeiieini nanoMHHaex'b P 2 HUApnKoxepiH, 110 Booôme syôbi 

 hwbioxtj oxHOCHxejibHO 3iiainxe.ibHO no.îbiuyio AJinny; xaKHîe AOMBHHpyioiiuiM'b aieMeHxosrb 

 HBJHexca napyîKHaa cxBHKa, h, nosHAHMOMy, tritoconulus npexepn'EBaex'b noBoport B r bxoMx.Hïe 

 HanpaBJieHiH. OAHano, P 1 HM'feexx. xpeyrojibHyw 4>opMy oôbiMHaro xnna, tetartoconus ciaôo pa3- 

 bhxX) — Hanôo.ibuiyio pojib oirb nrpaexx> y P 2 , — x. e. Trigonias npHnaAJieJKnx'b bï> drowb oxho- 

 menin in> itHOMy ximy, ifcwh miAp.'iKoiepiH. 3ax r BM'b, y Trigonias Mexa.îO'i>b y;i;e necpaBneiino 

 ôojfee jia3BHTb, iipeACxaBJifm ncupepbiBiiyio njiacxuiiKy on 3Kxojio<i>a kt> tetartocou'y, xoxa 

 y P 2 h ôo.TBe B3Ayxyio B r b cepeAHHB; bbcxbohho pa3Biixa crista; ciuibHo pa3Biixa 3aAHHH AOJiHBKa. 

 y Hopeniibixb HecpaBHeHiio cwjibHie pasBHxx» anîecrochet; OAHano, ripoxoio^-b xaKJKe pa3BHTb 

 cajibute MexajO'i>a, n M 3 npeACxaBJiflex'b eme xaKOH me neperHÔ-b 3aAHaro rpeÔHfl, KaK'b y 

 UHApHKOxepia. 



Bcb 9xh D])H3naKii yBasbiBaioxi) na HecoMHtHHO ooite BbicoKyio cxeneHb AH4»i>epeHHH- 

 poBKH 3y6oBi> Trigonias 00 cpaBiicniio cb HH,ipHKOxepieMT>. Bx> imjKHen qejnocxn ero 3Ha<H3xe.!ibHO 

 pasjH'iie MeaîAy JiojKiioHopeiuibiMii u KopemibiMii; Kopennbie npeACxaBJiflK)XT>, noBHAHMOMy, xx> me 



IipHMHXHBHbie UpiI3HaKII, KaKX. H y HHApHKOTepiil. 



1) OsLorn, Extinct Rhinoceroses, Mem. Am. M. N. 

 H., v. I. 



Roman, Les Rbinocéridés de l'oligocène, Arch. M. 

 Lyon, v. XI. 



A bel, Palâog. Rhinocer. Europas, Abh. k. k. g. R., 

 XX, If. 3. 



2) Osborn, 1. c, p. 92. 



3) Lucas, Proceed. Nat. Muséum, v. XXIII, 

 p. 221. 



Hatcbcr, Ann. Carnegie Mus., v. I, p. 135. 



