178 ON TIEK ER(;or OF EQUIDAF, 
the superpapiUary epidermis many pis^iuent <^roup.s are to be found. 
Stratum Reticularc, which forms the Corium, contains fine fibres which 
always run parallel with the layer and perpendicularly to the papillary body. 
In these fibres blood and lymph vessels are embedded. In the case of the 
{)ad man)' fat cells are found in this tissue, but in the lü'got they arc found, 
not in these fibres but in the Subcutis. 
Tne fine elastic firbres in Stratum Reticulare, running into the Papillae 
with blood and lymph vessels, compose the so-called Stratum Corpus Papil- 
lary. When this is stained with Vangieson's solution these fibres can easily 
be distinguished from the Rinden surface of Stratum Germinativum. 
The Rinden surface consists of one-layered cells, of somewhat cylindri- 
cal shape, containing a large nucleus which can be easily stained with Kaema- 
toxilin. The histological form of these cells is similar to those in the base of 
the Epithel of the Oesophagus, but the contents of the former cells are clearer 
than of the latter. 
The Papillae of the Ergot, according to my measurements, are 1-2.9 mm. 
long ; their number is greater than in the Chestnut and Pad and they are 
better developed. Their histological form is similar to that of the Papillae 
and Horn-tubes which are found in the claw wall of cattle. 
In particular the Horntube Mark and Horntube Wall cells and the easily 
stained granulated cells, which are found in the hoof of the young horse, 
are also seen in the Ergot. I cannot find such well developed Horntube Mark 
and Horntube Wall cells in the Callosity and the Pad. 
In my histological study of the Ergot I have remarked the following 
important points : 
1) A well developed Papillae which penetrates the Prickle Cell layer, 
made up of the Horntube Mark in Stratum Cornium, 
2) The number of Papillae is greater than in the Callosity and the Pad, 
3) In all other respects it is similar to the Callosity. 
As I have written above, from my microscopic studies, the histological 
structure of the Ergot is the same as that of the Callosity, especially in the 
