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188 BULLETIN :!l, UMTEI) STATES NATIONAL MUSEUM. 



The skill ol" the A. iiranm is smootli. Tliere are tliirteeii hiteral 

 IbUls between axilla aiid yroiii, and a stroiij; pectoro jiiilartbld. The hit- 

 ter rises on each side in front of the shoulder, and then turns upwards 

 and forwards. It is soon changed into a narrow dermal ridge or rib, 

 whieh is (Irst eonvex iii)wards and then eonvex downwards, and then 

 terminates in line with the e.ve a diameter of the latter behind it. 



The feet are short, i.nd the diyits are tlattened and are obtuse at the 

 tips. The pollex is only free by a slight notch, and the hallux by a 

 rather deei>er one. The phalanges are: Anterior, l-2-.'5-2; jmsleiior, 

 l-L'-:5-3-2. The third and (iflli anterior digits ar<' equal, while the 

 l)osteriors run l-2-i"i-;i-l, beginning with the shortest. The third and 

 fourth are nearly equal. 



The tail is somewhat depress(>d at the base, and beeonics round in see- 

 tion to the end of the jtroxima] two -fifths. It then becomes giadually 

 more compressed, until ic is quite Hat for the distal third. 



2 V / ^^afi/ III m \\\ ^ 7 



1 3 4 6 



T\r..W). AiitmJax iVcaniin. No. U'lOC. Slmst.i County, ('alifuniiii ; \. 



The color is black, relieved by a yellowish-brown shade of the ehin. 

 and of the i)alms and soles, and half the inferior side of tiie fore aim- 

 A line of the same (!olor passes from the nostril to the upper lip, and lln' 

 lower eyelid has the same color. The sui)erior surfaces and sides ot 

 the hea I, body, and tail are dusted rather thickly with small suiH'(pial 

 bluish-white spots, much as are seen in Plethodon (jlKtinosus. 



M(<isiii('ni( Ills III' Xo. 1 l,r)l)(i. 



M 



r,('ii{i;lli from end of iiin/zlc to ciul of tail I'.'vJ 



Li'iif^tli from (Mid of inii/./.lc to end of vont (IT I 



l,('iij;lli from (Mid of muzzle to jfroin (l.V.t 



li(Mi;;tli from end of innzzle to axilla (I'.M 



licnj^tli from end of inuzzli^ to cantlins oris dlt) 



I-iMiji;|]i of for(! 11 ml) diri 



l>enj;tli of hind limb (117 



lieiiniii of Iiind foot (t(W 



Width between orbitH (least) niKti; 



Width of head (;j;reat(>Ht) Oil 



The typical adidt specimen displays the anomaly of the suppression 

 of the fourth posterior digit of the left side. 



This salamander resembles tiie rkthmhn glntinosus in various re- 

 spects, especially in coloration. It lias, however, a compresscMl tail, like 

 tiie /'. intarmeiliiin, and short series of vomerine teeth. The reeurviMl 

 commissure of the mouth gives it the smiling expression ehjiraeteristie 



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t'.ii. 



