Tilt; IJATKACHIA OF NORTH AMKUICA. 



127 



Tliis is the most vormit'orm North Americiiin sahunaiitlor, reseinbliii}>; 

 the (KiUinna laiijonitis KoR'i'st. of Contral America in its proportions. 

 Its rehitioiis t;) the Jiatrocliosc/ni ultenuatus are close, but its dillerences 

 may be siimniarized as Ibllows: (1) The two patches of paras[>ljenoi«l 

 teeth; (li) tlie absence of dorsal grooves; (.{) tlie very elongate tail; 

 (I) the longer pat<!hes of voiueiinc teeth. The habitat of the H. vnntl- 

 (tins is much north of any from which tlie V>. aftcniuUuii has been ob- 

 tained. 



cS 



ti tl 



6 7 



I 3 



Fi;;. 'J7. lliilnii-ldisejis rdinJiitvii, No. l;).'(il. H.i.sslri'.s Uaibor, AliisUa; ; except Via. '>=\. 



(;iital(iL:iii- N'o. ol'j 

 miiiilier. , siiec.i 



I.iieiilitv. 



13JU1 



I UasHler llailiiir, Alaska 



From wli.an re.'eive.l. ^'''t'"" '''' «1»'^'- 

 i men. 



Uelliy K. Xielmls i Aleoliolie. 



.V 



IJATK'ACHOSKPS ATTENUATUS Escli. 



liniiiiii., rjiuii. H:il.; Ilullow., Joiini. Ac, I'liila., iv, 1,'<)8, p. IMS; Copo, 

 I'roc.'td. Ac. I'hilii., l,i(>'.t, p. "Jrt; Striiucli, Salaiii., p. !*:>; Gray, Cat. 

 I5iit;-. (Jrad. I'.rit. Mils., cil. i, p. ■«•>; IJoiilcnyicr, Cat. 15atr. GraJ. Brit 

 Mil • , I'.l. v., 1~.-^-,', p. til). 



iS<(liini(iitiliii(ii iilliiiiKittt, Ksclisfli., Zool. Atlas, p. 1, 1*1. til, tii^. 1-14. 



Tliis species is well cliaracteri/.ed by its slender form and its very 

 weak extremities. The costal folds are nineteen, more rarely twenty or 

 eighteen, and are well marked on the back and belly, and turned for- 

 wards toward tlie median line on the former, which is marked by a 

 delicate groove. There are tour latera\ folds in front of the fbie limb, 

 three of wliicli are crossed by a longitiullnal fold from tiie orbit. The 

 tail is longer than in any other North American salamander, except the 

 /.'. candatit.s, and is entirely cylindrical, and undistinguishable at the 

 origin from the Iiody ; it is marked by forty-seven distinct annuli to the 

 end of the vent. The toes are very small and obtuse, and free for the 

 length of only one plialange: below this a web connects them. The 

 inner toe on both feet is a mere knttb. The extended fore limb reaches 

 the transver.se Ibid behind the canthus oris; and the extended hind 

 limb covers four intercostal spaces. 



The head is short, broad, and flat, and the muzzle is as long as the 

 diameter of the orbit. The lip is more or less luominent below and be- 

 Ibre the orbits. Tlie palatimj teeth do not extend to behind the nares; 

 they form two very oblique short series, which nearly meet posteriorly 



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