THE BATRACIIIA OF NOKTH AMERICA. 189 



of the other species of Autoclox, wbicU is quite diftereut from that seen 

 iu Pletliodon. 



The Autodax iecanus was originally establisbecl on a half-grown speci- 

 men found by myself iu Shasta Couut}^, Cal. A second specimen of 

 the same size was sent to the National Museum by Mr. Charles Town- 

 send from the same locality. The young specimens do not display the 

 physiognomy of the genus, but have the usual want of character as 

 compared with the adult. The vomerine series of teeth are, however, 

 rather better developed. The typical specimen has the following char- 

 acters : 



The vomerine series are straight, and do not quite meet on the mid- 

 dle line. They are entirely behind the nares, and do not extend exterijr 

 to them. Tlie parasphenoid patches are united into one, and are well 

 separated from the vomerines. 



Form rather stout, and the tail short, equaling (from vent) the length 

 of the body (with vent) to the gular fold. Costal folds, 13. Head a 

 longitudinal oval, with rather narrowed and not truncate muzzle; its 

 length (to occiput) contained 3§ times in length from muzzle to groin. 



Limbs short; when pressed along the side they areseparated by three 

 intercostal spaces. The digits are short and the internal ones arerudi- 

 mental. 



The color is black everywhere, and the superior surfaces are dusted 

 over with minute light specks. 



Mecisuremcnts. 



M. 



Total lengtli ---.. 053 



Length from muzzle, to axilla 0105 



Length from muzzle to groin 0275 



Width of head at can thus oris OOG 



Length of anterior limb 003 



Length of anterior foot 002 



Length of posterior limb 0075 



Length of posterior foot 0032 



This species is to be compared with the Plethedon intennedius of 

 western Oregon. It is shorter and more robust in form, having only 

 thirteen costal plicce instead of fifteen. The color is very different. 



Cat. No. 



13791 

 1-159(5 



Xo. spec. 



Locality. 



Baird, Shasta County, Cal 

 do 



Collector. 



0. n. Townsend. 

 Liviujiston Stuiio. 



This species is named from the aboriginal name leka, of the grand 

 peak of northern California, Monnt Shasta. From the same name the 

 town of Yreka derives its name. So I am informed by Judge liose- 

 borough, of that place, to whom I am under great obligations for many 

 facilities and much information. 



