"^ 



i 



[luM\ nor is 

 ' the sliort- 



Tllli liATKACIIIA «>l' NOKTir AMKKICA. 47 



ii'.ilc (t) t'sliiblisli.'' Till! latti'i- genus, to^ictlicr with lianitlcns, On^M'lio- 



oids, bear- (lai't.vliis and 8alaiiiaii(irc'lUi (Voiii A.sia, have been sineo reft'ircd to I lie 



ated iVoMi Aiiihl.vsluiiiida' by l!()idan<«er, but 1 now liiid the hyoid apparatus to bo 



ous. Cuv- «|iiiti' (lillli rent in the two groups. 



Mitals aud Tlirt'c genera of this lanilly are known to nie. Another has bi-i n 



•aspiienoid (iisiiiignished on dental characters (Dieaniptodon), but whether iden- 



le, the tirst tie.il with or distinct from those I have seen 1 do not yet know. 



I. N'oiiicrdiinlatiiic tci'tli in a traiisvcrso lino, which is straight or angiiiatL'd ami not 

 'lining this nmch intcrniiitcd at tho iniddlo. 



dniorphic; Otoglossal cartilage foriniiig a ring, attached posteriorly to the first liasiliraii- 



chial cartilage ImbhjHtomn. 



Ologldssal carlilage t'orniing a snhtriangnlar plate attached posteriorly to the 



lirst hasilivanchial Clioiidruliif). 



^riorly pro- H. Vomcropdlatine ti'cth in two scries, scjiaratcd by a wide interspace. 



lentigerous Otoglossal cartilage not annular, free IVoni the hasibrancliial, on which it moves; 



Cter of the '"'' '""'"^ lAityualaimnit. 



... ^, Tail cominessed; dental series converging l)ackward niidwploiloii. 



The species of these genera are all North American cxcei)ting the 

 I (■j.jitm.i.. AmbljjstomapcrsimiUs Gray of Siam. 



\^ vGi'er^vcii AMIJLYSTOMA, Tschiuli. 



I which this Tsclmdi, liatr., ).. '.i'2 ; liaird, Jonrn. Ac. I'liila.(-J), i, l>^',[), p. ',>81 ; Oray, Cat., p. IM ; 



inent in the '"""• "^ ''''"'• '^' !'■ ^"^ ' ^'"l""' l''"*"'- ^^''- I'l'ilii-. l"'<i''> 1>- I'iti; «( ranch, Salam, p. 



(1(1; lioulcnger, Cat. liatr. Grad. JJrit. Mus., !.M ed., ltir^2, p. :!-:. 

 .Mlil.ointm, Tschndi, /. c, p. '.).'>; Gray, /. c. ; Duni. <Sl Ijibr., p. Itil. 

 .'lopmental ; s,ii(tm<iiitln>i(hf<, I'it/ing., Syst. Kept., p. :?:$. 



f rei>ressed iiri,vi>irium, Gray, /. c, p. :i:!. 



Ciimiir.il.ixiii, Cope, Troe. Ac. Tlula., lfi'>[), p. I-JiJ. 

 e Journal of l'ir!„iilosm, Mivart, I'roc. ZoOl. Soe., 18()7, p. G08. 



. . Lai val I'oiins : 



sed It in the SUrdv,,, Wagl., Syst. Ami.h., IrtliO, p. :.'()•) ; Duni. & Bibr., p. 17(1. 



of the char- .\.t„h,tv>^, (),ven, Ann. and Mag., X. II., xiv. p. 'ZW. 



ady l>ointed IkKmiimlomu, Sagcr, renins. Joiir. Medic, LSoH, p. 4-Jt*. 



II were Am- \'oiin'rine scries of teeth in the same line, though often interrui)ted. 

 • <^'''''y '"\'* (cMiadrateJugal bone wanting. Premaxillary bones distant from each 

 (Jray, in his othei', not embracting a fontanelle. 



this family. T.uigiie attiehod l)y its whole base, but with a narrow free margin ou 



Camarattuis all hut the postei ior portion, capable of but a moderate protrusion, 



•ssay of ISdO The ot tglossal cartilage forms a ring, which pa.sses entirely round the 



satiuaiUwy. nivAuniviviu'e of iho interior base of the tongue. It sends a i)r(>eesy 



graph of this on each side near its base, which terminates above theccratohyals with- 



tion of these out articulating with then). 



ty of Xiphih liypohyal cartilages slender, of moderate length. (Plate 2U.) 



Vmblystoma. CuMtohyal articulating by its abruptly rccurVed superior e.xtremity 



) determined with tiie po.storior di.stal part of the quadrate. (Plate 18, (ig.s. <S-10.) " 



taxis, as will Digits i-~), free, not (lonnected by natatory membrane. 



■, permanent A stratum of crypts more or less thickened on the parotoid region 



species. On and along the superior lateral region of the tail. 



)f the species A series of mucous pores round the orbit and for some distance ante- 



his I am not rior to it. 



