JACKAI.. 
<' I avoid, in general," says Pennant, " the 
mention of the internal struftiiM of animals, 
from a consciousness of my denciency in that 
branch of science : but must here remark, 
from Professor Gueldenstaedt, the able de- 
scriber of this long-lost animal, that the ccecum 
entirely agrees in form with that of a Dog, and 
differs from that of the Wolf and Fox. I 
may add, that there is the same agreement in 
the teeth with those of a Dog ; and the same 
variation in them from those of the two other 
animals. I mention this, as it is an opinion 
with some writers, that the Dogs of the old 
world did derive their origin from one or other 
of them.'* 
" The length, from the nose to the root of 
the tail, is little more than twenty -nine inches 2,. 
the tail, to the ends of the hairs,- ten inches 
three quarters ; the tip reaching to the top of 
the hind legs. The height, from the space 
between the shoulders to the ground,, rather 
more than eighteen inches and a. half : the 
hind parts, a little higher. 
It inhabits all the hot and temperate parts 
of 
