WINGS OF ICHTHYORNIS AND APATORNIS. 159 



Measurements of same bone. (Ichthyomis victor, No. 1726.) 



Length of shaft, 20.8 mm 



Transverse diameter of shaft, 3.5 



Greatest vertical diameter of shaft, 8. 



Transverse diameter of proximal end, 5. 



Vertical diameter of proximal end, 4.6 



Transverse diameter of distal end, 5. 



Greatest diameter at distal end, 7. 



Measurements of First Phalanx of Third Digit. (Ichthyomis victor, No. 1775.) 



Diameters of proximal articulation, 1.4-2.4 mm 



Greatest diameter of shaft, 4.2 



Length of part preserved, 8.5 



Measurements of "Wing Phalanges. (Apatornis celer, No. 1734.) 



Length of first phalanx of second digit, .... 14. mm 



Greatest diameter of proximal end, 4.2 



Least diameter of proximal end, 3. 



Least diameter of shaft, 2. 



Greatest expansion of shaft, 5.5 



Greatest diameter of distal end, . _ - 4.2 



Transverse diameter of distal end, - - 3. 



Length of second phalanx of second digit, 13. 



Greatest diameter of proximal end, 3. 



Least diameter of proximal end, — 2.5 



