(c.) _Thigh-bones._--I have had an opportunity of examining only a single perfect specimen of the thigh-bones. This is an entire bone, 18·2 inches long, with a least circumference of 3·5. Its perimetral index[108] consequently is ·192, which is about the normal standard. The _linea aspera_, at the middle of the bone more especially, is very prominent, so that the bone may be termed, in some degree, carinated (Fig. 46). The shaft is straight; and the chief peculiarities, besides the prominent _linea aspera_, which it presents, are (1) an unusual compression in the antero-posterior direction in the upper part, for the extent of about three inches below the _trochanter minor_. At about two inches below that process, or at a point corresponding with the lower part of the insertion of the _pectineus_ muscle, the shaft measures ·9 × 1·45, whilst in three other ordinary _femora_ with which I have compared it, the bone at the corresponding part measures ·9 × 1·20, ·9 × 1·10, ·9 × 1·15, showing that the Perthi-Chwareu _femur_ is unusually expanded laterally in the upper part of the shaft. The consequence is to give the bone at that part a peculiar aspect, which is especially seen in an acute internal angle, and one rather less acute externally, instead of the usually rounded internal and external borders. (2) The distal extremity appears to be rather disproportionately large as compared with a recent well-formed bone of the same length, the condyles measuring 2·5 × 3·3 instead of 2·4 × 3·05; and the lower part of the shaft is also somewhat expanded. But the chief peculiarity, as above remarked, is the compression of the shaft in the upper part. Besides the _linea aspera_, all the muscular impressions are strongly marked, and especially those for the insertion of the _gluteus maximus_ and the _trochanter minor_. The neck is long and very oblique, and the head, upon which only a small portion of the articular surface is left, must have had a diameter of about 1·9.