316 



University of California Publications. 



[Geology 



ratio just equal to that in Morphnus ivoodwardi and far inferior 

 to that in Geranoaetus grinnelli. 



Dimension op the Type Specimen 



Tarsometatarsus — 



Length over ail 112.6 mm. 



Length to center of papilla of tibialis anticus 18.6 



Transverse diameter of heail 18. 



Transverse diameter of foot 19.4 



Least transverse diameter of shaft 8.1 



Sagittal diameter of head 14.8 



Comparative Table op Measurements of Tarsometatarsi in 

 the Entire Series 



Maxi- Mini- Aver- 



mum mum age 



Aquila chrysaetos. 29 specimens — 



Total length 103.6 mm. 92.1mm. 102.2 mm. 



Transverse diameter of head 23.5 19. 21.5 



Transverse diameter through trochleae 25.5 21. 23.3 



Haliaetus leucocephalus. 13 specimens — 



Total length 103. 87. 94.7 



Transverse diameter through head 24.6 20.7 22.5 



Transverse diameter through trochleae 28. 21.5 24.7 



Geranoaetus grinnelli. 9 specimens — 



Total length 112.8 104.8 108.4 



Transverse diameter through head 



Transverse diameter through trochleae 20.8 17.4 19.6 

 Geranoaetus fragilis. 4 specimens — 



Total length 112. 103. 107.5 



Transverse diameter through head 18. 17. 17.5 



Transverse diameter through trochleae 19.5 17.8 18.7 



Morphnus woodwardi. 1 specimen — 



Total length 129.1mm. 



Transverse diameter through head 22.5 



Transverse diameter through trochleae 24. 



Transmitted July 11, 1911. 



