O. C. Marsh—Polydactyle Horses. 501 
the second digit.* Arloing has figured and described similar 
specimens. t leidy has described the right fore leg of a 
horse with a supernumerary digit on the inner side; — Kien 
subsequently discussed the same specimen.t{ A number of 
other instances have been recorded, shawing that ehe digits 
are by no means rare in the modern horse. 
_ The most interesting case of this kind examined personally 
by the writer is the horse ie vee in figure 4, This animal 
was on exhibition in New Orleans, in the spring of 1878, and 
Dr. Stanford EK. Chaillé of that ne first called the attention of 
the writer to it, and likewise sent a photograph, from which the 
cut below was made. 
i 
os 
aera 
pen ery ———= eSikeb, 
pit ——— pn i mn - 
a or Fond 
. Figure 4.—Outline of horse with extra digit on each foot. 
This same horse was subsequently brought to the North, and 
a few days since was on exhibition in New Haven, Conn., where 
the writer examined him with some care. The animal 3 is of 
small size, about ten years old, and is said to have been foaled 
* Osteological Catalogue, Museum Royal College of Surgeons, Vol. Hf, p. 537. 
re 1855 Sciences Naturelles, VII, 
Peininags Academy Natural Sciences, Ph Philedetphia. 1871, p. 112, and 
1876, p. 92. 
