8 University of Michigan 



distance between them four-fifths of the distance between the 

 nostrils; spiraculum median, a small slit just below the lower lip, 

 much nearer the insertion of the hind limbs than the end of the 

 snout. Anal opening median, concealed under the tip of a promi- 

 nent flap which is connected with the body at its base, and folds 

 back over the tail to which it is attached by a thin membrane. 

 Tail three times as long as deep, tip rounded, upper and lower 

 crests only slightly curved, the upper a little wider than the lower 

 and not extending on the body; depth of the muscular part at the 

 base seven-tenths the greatest total depth. 



Mouth unusually large; upper beak black, with narrow white 

 vertical line in the center and edged with white; no lower beak, 

 the only trace of it being a tiny curved black patch below the upper 

 beak; many series of minute papillae around the lower lip; con- 

 spicuous flaps above and on either side, the latter bordered by a 

 single row of little papillae. Series of labial teeth i\, occupying 

 the entire width of the lips, the tenth lower series interrupted 

 in the center; upper three ridges with more than one row of 

 teeth, the first ridge several, the second three, the third two; on the 

 lower lip the size of the teeth increases toward the beak. 



Lines of muciferous crypts not very distinct. There is a short 

 curving line on either side of the belly; another line starts on the 

 upper lip, curves forward, following the line of the lip, and then 

 turns sharply upward and backward along the lower part of the 

 nose and eye; just back of the eye it is met by another line which 

 curves around the eye and nostril above and meets the corre- 

 sponding line from the other side on the center of the muzzle"; 

 from the juncture of the two lines behind the eye a single wavy 

 line extends backward over the first third of the median line of the 

 muscular portion of the tail, then curves upward and is continued 

 on the upper edge of the muscular portion almost to the tip. 

 Several little groups of the crypts, in no apparent pattern, can be 

 distinguished on the back between the two wavy lines. 



