288 DISEASES OF THE HORSE’S FOOT 
filled with a yellow, semi-solid material, the remains of the 
inflammatory exudate and new horn secreted by the kerato- 
genous membrane. The lamine, both horny and sensitive, 
are greatly enlarged. This is a hypertrophy, resulting from 
the continued effects of the inflammation, and leads in time 
to the formation of lamine quite three or four times their 
normal size. It is this hypertrophy of the lamine and 
the pressure of the exudate that causes the bulging and 
increased growth of the horn at the toe (see Fig. 125), and 
Fic, 125.—Loneirupinat Section oF a Foot witH LaMINITIS OF 
SEVERAL YEARS’ DuRATION. 
contributes towards the oval formation of the foot we have 
mentioned before. 
In the longitudinal section the first thing noticeable is 
the change in position of the bones, more especially in that 
of the os pedis. The circumstances we have mentioned 
before—pressure of the exudate upon it in front and tension 
of the perforans on it behind—have caused it to assume a 
more upright position than is normal, so much so that in a. 
bad case the front of the bone becomes quite vertical. This 
vicious direction the other bones of the digit follow (see 
Fig. 125). 
