Till-: liATliAOllIA OF iNORTH AMERICA. 



231 



aborted braucliiDe, as occurs in the case of the other two in Siren lacer- 

 tina. The limbs are short and weak, aud their length enters that from 

 their base to the end of the muzzle two and a half times. The lateral 

 toes are generally of equal length, and the median one is a little longer. 

 All are acute at the extremity. 



The skin is entirely smooth, and there are thirty-four transverse grooves 

 betwesn the axilhie and the vent. The cross-grooves are continued on 

 the tail, so as to be distinct for two- thirds of its length. The tail is but 

 little compressed for the proximal three fourths of its length, the ver- 

 tical section being vertically oval or lenticular posteriorly. A narrow 

 dermal free border commences at the end of the proximal fifth of its 

 letjgth and increases in width to the tip, but is never as wide as in the 

 Siren lacerti)ia and in the Xecturus and Cryptobranchus. The inferior 

 dermal border is less extensive, existing only on the terminal fifth of 

 the tail. The tail is relatively longer than in the Sh'e^i lacertina. The 

 follicles of the skin are large, and so close together as to give the sur- 

 face a reticulated appearance. There are no distinct mucous pores of 

 a deeper character. 



1 1 J 3 



a ^'---^.^ Q / 5 



Fig. 58. P!<eudohranclnis striatus ; No. 7010; twice natural size; fig. 5, six. 



ihasurvmcnls of 5051. 



M. 



Total lengLli 152 



Length to end of vent 087 



Length to axilla 013 



Length to first branch ia 010 



Length to eye 0025 



Length to rictus ori.s 002 



Length of fore-leg 004 



Lengt h of f ore-foot 0015 



Width of head (greatest) 006 



Width between eyes 003 



Width of extended fore limbs 015 



The general color is chocolate brown, more or less tinged with lead- 

 color, especially when the epidermis is fresh. A rather wide yellow 

 band commences nt tlie last branch ia and extends along the side to 

 near the end of the tail. It is continued, but less distinctly, from the 

 branchiae forwards to the end of the muzzle. A narrower band com- 



