500 0. C. Marsh—Polydactyle Horses. 
The figures given below represent, (1) the foot of the modern 
horse in its normal condition, with the splint bones rudimen- 
tary ; (2) the foot nah elie ge with one splint bone 
earing a small hooflet; and (8) the foot of an extinct three- 
toed ancestor of the horse. The es are eal from the left side, 
and the numbers attached indicate the — digits, area 
from the inside. The first and fifth, corresponding to the 
thumb and little finger of "ihe human ‘and, are pease im 
these figures. A specimen similar to that ie desea in 
figure 2 is preserved in the Museum of Yale College. 
3. 
e 1.—Fore ost of Horse (Zquus). 
eae 2.—Fore foot of Horse Pe extra digit. 
Figure 3.—Fore in of Hipp 
The first recorded instances of extra gos in the horse, 
and eke in this work was “ eight- bod” having a small extra 
digit on the inside of each foot (p. 184, Plate 21 F. ). Winter 
states that this horse was exhibited in Germany in 1663, and 
a beg of it preserved in ie = Peed i was derived 
a person who had examined t nimal. The other 
hore described by Winter eee 136, "Pate 24), had a small 
hoof on the inside of each fore foo “ and this steed, Winter 
states, he had not only seen but ri 
Geoffroy Saint-Hilaire has Recided the fact that he examined 
a foetal horse which was polydactyle on the fore feet, the left 
foot bearing three nearly equal digits, and the right but two.t 
Owen has described the right fore foot of a horse with a double 
hoof, the extra digit Heng on the inner side, answerng to. 
* De Re Fes Se Nuremberg, 1703. 
+ Annales des Sart, XI, p. 224. Paris, 1827. 
