TIIK liATK'AOIlIA OK NORTH AMKRIf'A. 



103 



Tli»! total Icii^^tli of liir^icst s|«'('iiin'ii svvu (.">!).;!>, Saint Louis) is 

 iiiclit's, of wliicli tlio tail tbriiis 2M(). The smallest adult is li incliea 

 louj-'. 



In the Just jxM'iVctcd younf;- is simmi a series of illy-dediied liylit spots, 



lai't-er tiiau elsewlieie !ilon,u' eaeli side of the back. The belly is (|uito, 

 lij-ht (rolored. 



'J'his speeies bears a close reseinblaiiee to I'hthotlon (ilutinosHS, from 

 \vlii(th the jjenene pcculiiirili' the lon^'er digits, etc., readily distinguish 

 it. The bluish spots, too, a. inneh less sharply delined and duller, less 

 silvery, and do not o(!eur on the l)aek to anythin<;- like the same extent 

 as in /'. {ilKfiiiosiis. From A. jfircnionidntiin it will be known by the 

 projectiii}; lower Jaw, much smaller and more arched head, j-reater 

 nund)er of costal furrows, more evident spots on the sides, etc., besides 

 the important peculiarities of t()n<;'ue and teeth. 



This is one of the species whose metamorpiiosis is completed some- 

 tiuH' before il attains full si/,i^ A specimen in which minute stumps of 

 the branchiu' remain measures 2 in(;hes in len<,'th ; another without 

 traces of them, 2.1."* inches. The width of the head enters the len<;(h (o 

 the f>roin l.'J times, and tiie tail fall* short of the axilla from its base. 

 These measuremiMits may l»e compa/ed with those (jf the adult in illus 

 tration of the j;eneral jiriuciple that the relative lenji'ths ot body and 

 tail increases with iiutreased size. 



Th(! well developed lateral procM'sses of the otoj;lossal cartilaj;e ai»- 

 proach the character of Amblystoma more than is seen in any other 

 sp«'cies of (Jhondrotus, its very lonji median processes are not found 

 in anv other species of this ueiius. AIthou<;]i they lie closely apju'essed 

 in tl ■ lonj;' axis of the tongue, (hey are homologous, each with a half 

 of the (iircle of And)lvstoma. 



P4 



1 1 



1 1 



:il. 



il 



m 



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t 



ClionilvotiiK mkronlomim Copt'. 

 liKSia.'VK SKUIKS. 



l.oialiiv. 



Maiiili'vill,, r.ii 



^ M Il (\n nii'l, III . . . 



Siiiiil l.iitiis, Mo 



(') 



I'liilrio Mcr i;iiu"c, 



I.a. 

 Nrw Madiiil, M.i .... 



Kurt Sinitli, Aik 



NToiiiii <'aniii'l, III ... 



Wlicallaiiil, Iiiil 



('(iliiinliiiM. I Hijci 



Niw Mailiid, Mo 



Mount CariiiL'l, III . . . 



OaKlrv, S.<; 



Moiin't Caniiil, 111 ... 



n.'Uinill.', Ill 



IIiKl.ion'.s liay 



C) '. 



{'■) 



Saint I.otils, Mci 



Sollllll'Ill IllilloiM 



I.aiiiaslcr, Olijn 



(iiainl Coteaii, La 



Wli.n 

 nillcctrll. 



KicMii whom iri'riM'il. 



Nov. 

 •I line 



-,1H7C 

 -, If 7". 



Nov. -, 1HS1 

 .\lir. — , IhSI 



\.(). .Viadniiy 



SaiiiiU'l rimii 1 



Dr. (ico. I'lii^iU'niaiin. . 



.la.s. Kiiiiic 



N'alnio of siirci- 

 ini'ii. 



Alcoliolir 

 I III. 

 Do. 

 Do. 

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N'ov. — , l.-'SI 

 Apr. T), 1H87 



It. Kciiiiicott ! Do. 



Dr. H. !•". Sliniiiaiil Do. 



I,. .M.'riiiiii r I Do. 



ItoliiTt I!iil;;wa.v Do. 



j I'riil. I.. I.i'siincicnx Two larvii'. 



I U. Kriinicotl i'llUi. 



! I/. M. 'rimicr ; Alroliolic. 



— , 1«K1 



I''. W. liaywaiil 



I<. M. 'J'lmii'r 



Dr. A. Kciis.s 



V. W. llavdcn 



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W'.r.T.'l. Ks 



Dr (ii'o. KnCflinaiiti.. 



]{. Kciiiiiciitl 



I.. I.rsiilliTclIX 



Sl.(,'liailcs('i:l!f.;c ... 



Do. 

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11 



I I 



