DOUBLE-WALKERS. 



161 



fore part of the muzzle is covered in front with 

 a single large plate, the anterior border of which 

 forms a sharp edge : the tail, which is abruptly 

 conical, terminates in a sharp horny point or 

 nipple in the midst of a polished circular plate. 

 This species is about thirteen inches in length, 



TYFHLOPS. 



and about one fourth of an inch in diameter ; 

 its colour above is an uniform pale bluish grey, 

 that of the under parts a pale yellowish white, 

 sometimes tinged with rose-pink. The whole 

 surface of the body is beautifully smooth, and 

 highly polished during life ; but when preserved 

 in spirits, the edges of the scales being raised, 

 this appearance is quite destroyed, and the surface 

 is rough. 



M 



