S(« 



lili 



72 



mi.LHTlN ;!l, INITKI) .STATES NATIOXAI- MI'SHUM. 



titioii, iiiKl it is iiu-MlioiR'(l lioiv to sliow tin- -iriitn ■;ciicial coiiiplete- 



iiess of (ii'vi'l(»i»iiiciil ill I Ih'sc- Eastern iiidiv itliials. 

 h. Si'iit'ssli^iiti.v air.lu'tl, not passing l.ctwrcii iiaivs. Two siK'ciiiiciis, 



laij;L'. Ill No. .{!»!»;{ l>otli outer .se<4iiients are well .separated iVom llio 



meriiaii: the tail is loiij^er than head and body, and width of J.iws \M 



to line of yroin. Tliis individual is alieiranl. 

 V. Series aii.uiiiated, not exteiidinji- anterior to anterior inar«iiH»f inner 



uarcs. Xos. ;5!i.')(;. L'!t71, .'J'.KJ, ;!S<».-), ;iS;i!t, rinhraeinjjf live speeiinens, 

 three laijic ones, in I'iiiladelphia Aeadein.v inuseuni, and type of A. 

 i)tf/rn.s (ireeii in same. 



This latter s|>e('iinen is peculiar in some respeels, as already noted, in 

 coloration. 1 he head is relatively a little wider than in other speciinen.s 

 ol' the .same lar^e si/e, the width entering the leiij;tli to the ;4ioiii four 

 times, as in individuals of the smaller aveia;;*' size of the species. Tho 

 leii.uth of theeyc lissure enters L'..') times the interoiltital width, instead 

 of twice. thoii;^li in one ofcMpial si/e from Ifoot Ifiver it enters L.'.!.' times. 

 The nares are not more than usually separated; hence the muzzle is 

 more eoiitraitteil than usual. It is also depressed in prolile, but not more 

 than ill some other specimens. I l>elie\'e it not to he a distinct si)eeies, 

 hut a form dependent on causes similar to those prodiiein;: Dthers heie 

 enumerated, and not more pennaneiit than those, so loiiu as those causes 

 are not iinivcr.-al. In other words, it is a lar.uc specimen, with tcctii. 

 head, and tail of adult character, hut body and muzzle inoie larval. The 

 fold on the hind U"^ and outer toe, mentioned by (Irceii, is not marked, 

 or dilfeifiit I'kuii that seen in the species uciierally. 



No. I(i!t7, sixteen specimens from westt'iii Illinois; two have the seiit s 

 divided into tour; KH>'{, two specimens; No. KliM. Cook County, III., 

 thirtylbiii speciiiieiis; one has the three iiilcrruptions. and live, with 

 one (»f U)\y,i. a nicdian, makiii;^ two series of teeth. 



Of theattove the tongue is of nor.mal size ami the braneliia' ab.soibed, 

 exeei)t in twelve spe<;imeiis (No. M't'M) of which live present stumps of 

 the braiichia'; and two (Kll»7) where both the loimiic is very small and 

 the ,uill stumps remain. The wi.lth ol the head is .'_'."» to j:roin, and the 

 tail never lonj;ertlian head and body. 



(I. i\Icdian series arched, extemlinji' anterior to anteiitu' mar;;in of 

 inner nares, Oiiespeciiiieii (.ilMKi) is fully developed in all other points. 

 c. Palatine series an.unlated, extending; anterior to inner iiare.s' ante- 

 ri(U' border. Nos. KMT, .litT I, .'lUTd, tw(» ot lii'.»;{, .'is.ST, .is'.t'.i/*, four of 

 4(>!»7, nine of KI'.H. All ofthe.se have the sluut head and tail -iveii in 

 the pieliininary dia<;nosis, The small or lar\al t(mj;iii' Oi-ciirs in (Uie of 



10!t;{. ;;()7(l. ;{!I7I, nine of Ki'tl. (woof |(>!I7; branchial iiidiiiieiils remain 

 in two ot Kl!»7 and nine of HUM. No. I(».")7 is remarkable in having ii 

 very small tonjiue, and short deep tail, no stumps of braiichia-, and 

 brilliant coloration, with lar;:e size and -eiici.il adult appearaii<-e. It 

 compaivs with certain specimens ( K;'!,".. ;!!IS I j of the form iiiiirortiKin 

 in this stroiij;- retention of .some larv.d characters, and, like them, is 

 from northern .Minnesota, a reyioii noted for its cold and late .seu.sons. 



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