ote MEMOIRS OF THE CARNEGIE MUSEUM. 
as in the metacarpals, and separated from the shaft by a prominent groove which 
terminates in pits on either side of the trochlea, not unlike what is seen in the 
carnivores. Plantarly there are the usual large surfaces for the sesamoids which 
are separated by a heavy keel. The latter extends well down and is abruptly 
terminated by the hemispherical surface on the dorsal face. 
In Nestoritherium the second metatarsal is relatively shorter than in Moropus. 
The shaft is also more trihedral, chiefly due to the greater development of the 
fibular face and the dorso-tibial angle of the shaft. Distally the metapodial keel 
is less prominent, and the trochlea somewhat more oblique than in the American 
form. 
In Macrotherium the metatarsals are relatively shorter and heavier than in 
Moropus. In the former the head of Mt. II rises above that of Mt. III as in the 
latter, but the articulation for the mesocuneiform is more cup-shaped, and the 
facet for the ectocuneiform takes up.a larger portion of the proximal end. Further- 
more, the lateral articulation is less interlocking in the European form due to the 
absence of the prominent arm at the dorso-tibial angle (see Fig. 104, 2). In 
Macrotherium the shaft is broader transversely while the distal trochlea is quite 
similar to that in Moropus. In the former the trochlea is, however, less distinctly 
separated from the shaft dorsally than in the latter genus. 
In Schizotheritum priscum Mt. II is apparently slenderer than in either Chalico- 
thertum, Macrotherium, or Moropus."* Proximally the head is rather compressed 
laterally and not much expanded antero-posteriorly. It would appear that there 
was an entocuneiform of considerable size in the tarsus of this early genus, judging 
from the margin of what appears to be an articular facet of considerable size on 
the injured (?) tibial face of the head.“ The shaft is somewhat less cylindrical 
than in Moropus, while the distal trochlea is quite similar. 
MEASUREMENTS OF SECOND MrraTarsaL.” 
No. 2193 Y.M. No. 1706a No. 1701 No. 9368 A.M. 
(M. elatus, type), (MM. elatus), (M. petersoni), (M. matthewi), 
mm. mm. mm. mm. 
Bye a¥airl 0 Rae ieee ohne pre in Twi are rt ream Ne pears fot pS 134 137 105 123 
Antero-posterior diameter of head.............. 49 48 39 46 
Transverse diameter of head. ...............-.0- 36 40 30 50 
Transverse diameter of distal end............... 38 46 30 48 
Antero-posterior diameter of distal end.......... 41 48 35 48 
78 Mt. II, which Filhol associates with the pes of Schizotherium, is probably not of the same individual. 
7 Tn consulting Filho] (Observations concernant Quelques Mammiféres Fossiles Nouveaux Du Quercy, 
Ann. Sci. Nat. Zool. et Pal., Tome XVI, 1894, p. 147) it would appear that this surface is caused by a pick used 
in excavating the specimen. 
7% Italicized numbers represent estimated measurements, 
