(iKEciORY: xoTifAnrrrs, an American eocene primate 



101 



Mesocuneiforin 

 Plate XXX; Text FiK- 22 



This bone being wedged in between the ento- and ectocinieiforni forms part of tlie trans^'erse arch 

 of the instep, consisting of the cuboid and the three cuneiforms. In the front view the mesocuneiform 

 of Notharctus is rectangular, the long axis being nearly vertical, while in modern lemurs the bono is of 

 varying shape but always more oblique in position, so that it widely overlaps the entocuneiform on accoimt 

 of the wider divergence of the hallux in the modern genera. But, in some respects, there are greater 



3 



4 



Fig. 22. Coinparatixc series; rijilit pes, inner side, of Autliiirrtu.s, l.ciiiiir, Cihii.s, Mdcart/.s, after the reiiioNal of tiie 

 liallux. Natural size. 



1. Nothaniu.<<<jslj,in,i. Aiuer. Mvis. No. 1 1474. 3. Cchiis In/polcucii.-i. Ainer. Mus. No 1401(). 



2. Lemur iiioiigoz. Amer. Mus. Xn. 228.SG. 4. Rfdraciis luiiKs/riiius. .-Vmer. Mus. No. 14012. 



differences in the ])osition and form t)f the mesocuneiform within the genus Lt'ttntr than there are I)et\veeu 

 a certain specimen of Lemur varius and the specimens of Notharctus. 



The general form of the mesocuneiform of Notliarcius is irregularly wedge-like, the narrow edge 

 being on the plantar aspect of the tarsus. The bone is fastened in place on the dorsal aspect by trans- 



