102 ODONTORNITHES. 



The terminal bone of the fomth digit is wanting in all the specimens 

 of Hesperornis yet discovered, but its general form may be conjectured 

 from the corresponding joint of the second toe, which is in a state of good 

 preservation. From this specimen, the outline of the terminal phalanx of 

 the outer digit has been indicated in the restoration of Hesperornis regalis, 

 Plate XX. 



Measurements of the phalanges preserved of the fourth digit in 

 Hesperornis regalis, and Hesperornis crassipes will be found below : 



Measurements of First Phalanx of Fourth Digit. {Hesperornis regalis, No. 1200.) 



Length of first phalanx, 44.0 mm 



Vertical diameter of proximal articulation, 19.0 



Transverse diameter of proximal articulation, 16.0 



Greatest diameter of shaft, 22.0 



Least transverse diameter of shaft, 13.0 



Least vertical diameter of shaft, 11.0 



Transverse diameter of distal articulation, . 15.5 



Vertical diameter of distal articulation, 15.5 



Diameter of " peg " in distal articulation, 7.5 



Measurements. (No. 1206.) 



Length of first phalanx, 42.5 mm 



Vertical diameter of proximal articulation, 18.0 



Transverse diameter of proximal articulation, 16.0 



Greatest diameter of shaft, 22.0 



Greatest transverse diameter of shaft, 17.0 



Least transverse diameter of shaft, 13.0 



Least vertical diameter of shaft, 10.5 



Transverse diameter of distal articulation, 15.0 



Vertical diameter of distal articulation, ' 15.5 



Diameter of " peg " in distal articulation, 7.0 



Measurements of First Phalanx. {Hesperornis crassipes, No. 1474.) 



Length of first phalanx, 42.0 mm 



Vertical diameter of proximal articulation, 18.0 



Transverse diameter of proximal articulation, 16.0 



Greatest diameter of shaft, 21.5 



Least transverse diameter of shaft, 12.5 



Least vertical diameter of shaft, . 12.0 



Transverse diameter of distal articulation, 15.0 



Vertical diameter of distal articulation, '. 15.5 



Diameter of " peg " in distal articulation, 7.5 



