176 ODOXTORXITHES. 



Measurements of Tarso-metatarsal. (Ichthyornis victor, No. 1456.) 



Greatest diameter of distal end, 9. mm 



Transverse diameter of inner articulation, 2.6 



Vertical diameters of inner articulation, _ 2.4-2.1-3. 



Transverse diameter of median articulation, 2.7 



Vertical diameters of median articulation, 3.4-2.8-3.6 



Transverse diameter of outer articulation, .. 2.5 



Vertical diameters of outer articulation, 3. 1-2.4-3. 



The Phalanges. 



A single phalanx, probably from the middle or perhaps from the outer 

 toe, is preserved in specimen number 1732, and is figured on Plate 

 XXXIII, figure 8. The proximal articular face is divided by a median 

 ridge, separating two not very unequal grooves. The shaft is slender and 

 tapering, rounded above, and flattened below. It is tenninated by a 

 medially grooved distal articular face, as in ordinary birds, without any 

 indication of the |Deg-and-socket articulation, seen in Hesperomis and some 

 other swimming birds. 



Measurements of Phalanx. (Ichthyornis victor, No. 1732.) 



Length of phalanx, 9. mm 



Vertical diameter of proximal end, 2.4 



Transverse diameter of proximal end, 2.2 



Vertical diameter of distal end, . 1.4 



Transverse diameter of distal end, 1.8 



