FOURTH REPORT OF THE DIRECTOR I907 IO3 



There is a tuberosity of slight elevation resembling a third tro- 

 chanter and below it and extending within 35 millimeters in a dia- 

 metrical plane of the superior arterial foramen is the hypotrochan- 

 teric fossa. Its depth is accentuated by. a flangelike projection of 

 the shaft. The femur is not especially platymeric, index 74.3. 



The lower portion of the femur is apparently normal although 

 the external tuberosity is large, but this seems a characteristic of 

 many of the femora. 



Specimen 4505 ; a typical shaft. It is 428 millimeters in length 

 and weighs io}4 ounces. In color it is a straw yellow and like all 

 the other bones bears no sign of fossilization. The neck is long and 

 the ball bears a deep lozenge-shaped fossa of the interarticular 

 ligament. The liiiea aspera is heavy and above the arterial 

 foramen becomes the gluteal ridge, the width of which is accentu- 

 ated by the flangelike projection on the anterior border of the shaft. 

 Above this ridge is the third or supernumerary trochanter. The 

 sagittal diameter of the shaft is 24 millimeters and the transverse 

 34, which gives the platymeric index 70.6. 



Specimen 4516; a short heavy femur with a length of 435 milli- 

 meters and a weight of 11 ounces. The upper portion is heavy 

 and abnormal in several characters. The neck is short and the 

 great trochanter heavy. These characters give the upper portion 

 of the femur a wide, heavy appearance and the upper part of the 

 head or ball rises scarcely a centimeter above the top of the great 

 trochanter. The portion of the ball surrounding the fossa of the 

 interarticular ligament is flattened and the fossa is small. On the 

 internal side of the ball at its juncture with the neck there is a 

 depression 12 millimeters in length and a millimeter wide. The 

 digital fossa is deep, wide and filled with small tubercles. The 

 cavity reaches down along the intertrochanteric ridge to the lesser 

 trochanter. The shaft is not platymeric. 



Specimen 4513; a large shaft, probably male, with a length of 

 470 millimeters and a weight of 11 ounces. It is noticeably platy- 

 meric and has an index of 63. i. Part of the great trochanter is 

 broken and with it the upper part of the external border of the 

 shaft. An elevation in the l>one just where it is broken seems to 

 indicate that a third trochanter had been broken off. 



Tibiae. One of the peculiarities of the tibiae which is at once 

 apparent to the most superficial observer is the transverse flattening 

 of the tibial shaft which gives it a saberlike appearance. This 

 anomaly is present in 75 per cent of the tibiae from (iorry and 



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