318 
On the Teeth of the Ox, Sheep, and Pig, 
week, but it is not until the last named date that we can trace even; 
an outline of tioo teeth or more, oi four and oi six, all of which, 
however, Nature exhibits of 
full size in orderly succes- 
sion at birth, in the second 
and in the third week re- 
spectively. 
The eight temporary inci- 
sors of the calf are in all re- 
spects, excepting size, the 
counterparts of the perma- 
nent by which they will be 
succeeded. The first or 
middle pair is the largest of 
the set, and the corner pair 
the smallest, a gradual de- 
crease taking place fiom the 
one to the other. These 
teeth by the end of the fourth 
Aveek, owing to the growth 
of the maxillary bone, are 
less crowded together than 
when first cut, although 
they are still observed to be 
partially overlapping each 
other. 
Not only are the incisors 
all up by this time, but the 
temporary molars are also in 
their place. It may be again 
necessary to state, that these 
are twelve in number, three 
occupying each side of both 
jaws (upper and lower). The 
engraving (fig. 22) of the 
lower jaw of the calf at a 
month old, gives the general 
form as well as position and 
size of the incisors and mo- 
lars. 
The temporary molars 
have many peculiarities, the 
chief of which must be 
* Fig. 22. Lower jaw of a calf one month old, natural size, showing that 
the eight incisors and the three temporary molars ou each side of the jaw are in 
situ. 
