Pi IKRSON : New Camki, from the Miocene ok Nebraska. 265 



Third Cervical, greatest length 187 



Third Cervical, greatest length of centrum 154 



Third Cervical, transverse diameter of prezygapophyses 44 



Third Cervical, transverse diameter of postzygapophyses 46 



Third Cervical, vertical diameter, prezygapophyses to ventral border 52 



of centrum 52 



Third Cervical, \crtical diameter, postzygapophyses to ventral border 



of centrum 63 



Fourth Cervical, greatest length 170 



Fourth Cervical, greatest length of centrum 147 



Fourth Cervical, transverse diameter of prezygapophyses 60 



Fourth Cervical, transverse diameter of postzygapophyses 48 



Fourth Cervical, vertical diameter from prezygapophj'ses to vertical 



border of centrum 50 



Fore Limb. 



(Plate XL.) 



The distal end of the humerus and the proximal end of the ulno- 



radius were found articulated in situ, and in close proximity to the 



type. These fragments are only provisionally referred to the type, 



pending the discovery of more complete material of this species. 



The fragment of the humerus as well as the ulno-radius are only 

 slightly larger than the corresponding parts of 0. longipes and display 

 no noteworthy differences from those of the latter species, described in 

 the Annals of the Carnegie Museum, Vol. II, p. 454, 1904. 



A first phalanx, PI. XL, Figs, 8, 9, which was found in the talus, below 

 where the above described specimen was found, may or may not belong 

 with the type. The bone is less robust than the corresponding bone in 

 Oxydactylus longipes. 



Measurements. Mm. 



Humerus, antero-posterior diameter of distal end, internally 51 



Humerus, transverse diameter of trochlea distal end 48 



L'lno-radius, transverse diameter of articulation for humerus at head 



of radius 48 



T 'Ina, length of olecranon process, approximately 68 



Conclusion. 

 The remains described above furnish additional proof of the struc- 

 tural variations which these animals developed before the closing 

 epoch of their existence; and incidentally also speak quite eloquently 

 of the various changes, which sometimes undoubtedly took place in a 



