National Institute of Informatics - Digital Silk Road Project
Digital Archive of Toyo Bunko Rare Books

Cuboideum. | Equus pampellii. | Equus asinus. | Hipparion. | Equus przewalskii.
| mm. P. ct. | mm. P. ct. | mm. P. ct. | mm. P. ct.
Length of bone..................... | 31 100 | 37.5 100 | 30.5 100 | .. 100
Longitudinal diameter of facet for metar-
sus medius........................ | 8 26 | 9 24 | 7 23 | 11 35.5
Transverse diameter of same......... | 7 23 | 6.5 17.3 | 6.5 21 | 10.5 34
Longitudinal diameter of facet for metar-
sus externus....................... | 17 55 | 15 40 | 17 56 | 20 64
Transverse diameter of same......... | 7 23 | 8 21.3 | 9.5 31 | 7 23
Width on smallest part.............. | 3 .. | .. .. | 6 .. | .. ..

Cuboideum. | Solutré. | Cardamone. | Equus stenonis. | Recent horse.
| mm. P. ct. | mm. P. ct. | mm. P. ct. | mm. P. ct.
Length of bone..................... | 38 100 | 45 100 | 40.5 100 | 40.5 100
Longitudinal diameter of facet for metar-
sus medius........................ | 12 31 | 14 31 | 12 29 | 16 39.5
Transverse diameter of same......... | 10.5 27 | 12.5 27.7 | 9.5 23.4 | 13.5 33
Longitudinal diameter of facet for metar-
sus externus....................... | 24 63 | 23.5 57 | 20 50 | 20.5 50
Transverse diameter of same......... | 10 26.3 | 11 26.8 | 11 .. | 10.5 26
Width on smallest part.............. | 7 .. | 6 .. | 8.5 .. | 5 ..

More important is the *distal articulation surface of the cuboideum*. The small
joint for the metatarsus medius possessed by *Paleotherium minus* and Anchitherium,
but enlarged in the genus Hipparion and in horses, is in the Anau horse uncom-
monly small, in *absolute* measurement smaller even than in the ass, and approaches
wholly in dimensions the Hipparions of Mt. Léberon. This dimension is greater
in *Equus przewalskii*. Nevertheless, the *relative* dimensions show that the Anau
horse stands midway between *Equus asinus* and *Equus stenonis*, and that *Equus
przewalskii* even surpasses the recent horses in the size of these dimensions.

While in many recent horses and in *Equus przewalskii* the forward part of the
facet for the metatarsus externus is separated from the posterior part, there is no
breach of continuity in *Equus pumpellii* nor in the horses of Solutré and Carda-
mone. The narrowest place in the articulating surface for metatarsus externus—