
162 Cincinnati Society of Natural History. 
The femur, like the humerus, is flat, but not twisted as is the 
latter. Its greatest length is 7.2 inches; greatest width across 
condyles, 2.3 inches; gr¢atest width across tuberosities, 2.7 
inches; least width across shaft, below middle, 1.2 inches; least 
thickness of shaft, .8/inch; length of articular surface for 
patella, 1.35 inches; width of articular surface for patella, 1 inch; 
neck, well defined, greater diameter, .8 inch; lesser diameter of 
neck, .5 inchp 
The axis of the neck makes an angle of about 130 degrees with 
the axis of the shaft, and is slightly bent forward. 

Fie. 22.—One-third natural size. Femur: 1, leit side, anterior aspect; g, great 
trochanter; l, lesser trochanter; ¢, third trochanter. 2, Right side, posterior aspect. 
The fossa between condyles is half an inch wide in front, and 
three-fourths of an inch behind. With the shaft in a vertical posi- 
tion, the great trochanter rises half an inch or more above the 
head, from which it is separated by a notch as wide as the width 
of an average finger. 
Of the same dimensions is the notch separating the lesser tro- 
chanter from the head. The trochanteric fossa just buries the end 
of a medium-sized thumb, and has a rougher secondary depression 
in its middle. 
In Castor will be noticed the well-defined third trochanter, with 
its greatest prominence midway of the outer border of the flattened 
