372 
A. ZUNDEL. 
the thing first noticed is a change in the connection of the 
os pedis with the wall. These changes, however, exist principally 
at'the toe, and extend as far as the half of the quarters, on a level 
with the lateral cartilages of the foot, while further backwards 
they are not to be observed. On the side some laminae are always 
found in their normal condition, as can be seen by a section of the 
foot made transversely. Generally, a yellowish substance, of 
horny appearance, but softer, fills up the space situated between 
the walls and the keratogenous structure. This is the product 
of the exudation of the inflamed podophyllous lamintae, mixed 
with the horny substance which they secrete normally. These 
laminae arc themselves hypertrophied,being sometimes one and two 
centimeters in length and exceeding by four or five times tlieir 
normal size. The keraphyllous lamina? are also hypertrophied, a 
condition which is evidently due, as respects the podophyllous 
tissue, to the increase of vital activity, resulting from the Inflam¬ 
matory condition of the tissue and to the infiltration by fibro¬ 
plastic exudation, resulting from the inflammation. As to the 
keraphyllous laminae, they repeat on the internal face of the wall) 
in an inverse manner, the disposition of the secreting laminae of 
the hoof between which they are formed and lodged. These, 
however, as they increase in extent, unite at their base in the 
whole of that portion which does not cooperate to their union 
with the podophyllous bands, and then forms a compact mass 
uniting most frequently with the internal face of the wall. Some 
times this mass of yellowish hoof occupies the whole space be¬ 
tween the os pedis and the wall, but in some cases it adheres only 
to the wall, when it forms around the keratogenous tissue, a new 
wall, also provided with keraphyllous laminse, and there is 
formed between it and the normal wall that porous, brittle mass, 
without homogeneity, which fills up the space, which constitutes 
the seedy toe. The mass thrown between the wall and the os pe¬ 
dis presses upon it; the anterior face of the bone assumes a ver¬ 
tical direction, and the os pedis presses towards the solar arch on 
its anterior border at a point situated posterior to that where, in 
normal feet, this border rests. Notwithstanding its resisting power, 
the wall gives to the effort of the mass interposed in front, the 
