70 
Mr. Home's Description of the Anatomy 
up perpendicularly ; this, however, is now ascertained not to be 
its natural situation. 
The under surface of the upper half of the bill is also smooth ; 
but has two hard ridges of a horny nature, an inch long and 
To an inch broad, situated longitudinally, one on each side of 
the middle line of the bill. : 
The lower portion of the bill is much smaller than the upper; 
and, when opposed to it, the lip of the upper extends beyond it 
for the whole of its breadth. The edges of the lip of this lower 
portion have deep seme, in a transverse direction, like those in 
the duck's bill, but they are entirely confined to the fleshy lip ; 
and, immediately within these serrated edges are grooves, lined 
with a horny substance, which receive, in the closed state of 
the bill, the ridges of the upper portion above described. There 
is also a cuticular flap extended upon the hair, as in the upper 
portion of the bill. 
The nostrils are two orifices, very close to each other, near 
the end of the bill ; the upper lip projecting of an inch beyond 
them. 
The eyes are very small ; they are situated more upon the 
upper part of the head than is usual, and are directly behind 
the loose edge of the cuticular flap belonging to the bill. The 
eyelids are circular orifices, concealed in the hair; and in the 
male are with difficulty discovered, but in the female there is a 
tuft of lighter hair, which marks their situation. 
The external ears are two oval slits, directly behind the eyes, 
and much larger than the orifices of the eyelids. 
The teeth, if they can be so called, are all grinders; they 
are four in number, situated in the posterior part of the mouth, 
