SCHIN. YOSCHIDA 
A.) Histological structure of the pads of cat and dog, 
a) Pad of domestic cat. 
The Stratum Mortificatum is composed of quite dry, flat, scaly cells, from 
which hornified scales are thrown off from the superficial layer. In the pad 
of the cat this layer is more compact than in the Chestnut of the horse. 
The Strasum Mortificatum gradually merges into the Stratum Corneum 
with no distinct connecting line. This latter Stratum consists of layers of 
cells with hornified membrane, and large and small scales which are continu- 
ally forming the Stratum Mortificatum. These are the dead elements. In 
this layer, the INIarklayer of the supra papillär epidermis, which is to be seen 
in the epidermis of the Ergot, cannot be found. 
Stratum Corneum is connected with Stratum Granulosum by Stratum 
Lucidum. This latter consists of hornified cells without nucleus; the cell wall 
is hardly to be seen even in thin sections, and is generally quite indistinct. 
Stratum Granulosum is a quite thin layer, and is only to be distinguished 
from its upper layer, Stratum Lucidum, by staining with Hematoxylin as the 
nucleus of the cell of Stratum Granulosum is easy to stain. The cells of 
Stratum Granulosum are quite flat in form and contain a small round nucleus. 
Stratum Spinosum or Stratum Malpighii in the pad of the cat is very 
well developed, and contains the cone-shaped Papillae which do not penetrate 
this layer as in the case of the Ergot. 
The Prickle Cell of Stratum Spinosum is larger than in the Callosity 
and Ergot, and more distinct. The cells are joined by means of fibrils which 
pass from one to the other as in the case of other hornified cells. 
Stratum Germinativum consists of cylindrical cells, containing a nucleus, 
and arranged in rows in cjuite thin layers which gradually merge into Stra- 
tum Spinosum with no distinct dividing line. When the pad is black this 
Stratum Geraminativum contains much pigment, and when it is stained with 
Hematoxin takes a strong colour which distinguishes it from the other layer. 
From this layer (Stratum Germinativum) the cells are continually being- 
divided and driven upwards with the groups of pigment bodies and gradually 
