Peterson : Description of Stenomylus. 295 



Antero-posterior diameter of distal end of humerus 27 



Greatest length of ulno-radius 254 



Greatest length of radius 225 



Transverse diameter of head of radius 32 



Greatest transverse diameter of distal end of ulno-radius 30 



Greatest antero-posterior diameter of distal end of ulno-radius 20 



Greatest height of carpus 22 



Greatest transverse diameter of carpus 26 



Greatest length of mc. Ill 184 



Greatest length of mc. IV 182 



Hind Limb. — The femur is proportionately short when compared 

 with that of Lama huanaco, and especially so with that of Camelus 

 bactrianus. „It is relatively but very little longer than in Oxydac- 

 tylus longipes. In the type specimen the greater and lesser trochanter 

 and the rotular trochlea are broken away and lost, and the shaft of the 

 bone has also received considerable crushing. The head and distal 

 end are, however, quite perfect. The former is well rounded and the 

 pit for the round ligament is rather small and located on the posterior 

 half of the head on the tibial angle. The bridge from the head to 

 the greater trochanter is compressed antero-posteriorly and the digital 

 fossa is probably of the same relative size as in Oxydactylns. The 

 lesser trochanter is damaged, but enough is present to indicate that 

 its relative position and size are the same as in Oxydactylns ; i. <?., 

 its superior limit is on a line with the lower margin of the digital 

 fossa as in Lama, and higher than in the camel. The shaft has a 

 considerable forward arch, and the internal and external supracondy- 

 lar ridges are fully as well developed as in the La??ia, but the linea 

 aspera is apparently of relatively less development. The distal end is 

 not much expanded transversely. The internal condyle is smaller 

 than the external and is placed obliquely to the long axis of the bone. 

 The intercondylar notch is shallow, and, as in Oxydactylus, narrow and 

 oblique. 



The tibia is long, slender, and straight, with enlarged proximal and 

 distal ends. The antero-posterior diameter of the proximal end is 

 especially conspicuous when compared with the tibia of the recent 

 forms. The articular facets for the femur are nearly equally divided 

 by the prominent bifid spine ; the external facet is slightly wider than 

 the internal, and terminates in a prominent process on the postero- 

 fibular angle. On the posterior face of the shaft, immediately below 

 the head, the external and internal borders are much less developed 





