| OCR Text |
Show 206 MR. RUDOLF MARTIN ON A FOSSIL [Mar. 3, The trochanter and the linecv asperce of the proximal end of the femur are not to be distinguished from the same parts in the recent Ostrich; even the pneumatic foramen in the caudal surface is found in the same place. The middle part of the bone is just as in S. camelus, and the distal end differs only in one particular : the fossa intercondy-loidea is much elongated, so as to form a slight valley in the distal J oi* | of the rostral surface of the femur. In the caudal surface, immediately above the proximal border of the trochlea, there is also a funnel-shaped pneumatic foramen which enters the bone obliquely (from the mesial border of the bone, and is directed towards the middle of the axis of the trochlea). As in the recent Ostrich, there is a tuberosity between the wide orifice of that foramen and the mesial edge of the caudal surface. The petvis (text-figs. 32-34) differs in some respects rather considerably from that of the recent Ostrich; but the individual Text-fig. 33. Pelvis of Struthio karatheocloris. Dorsal view. variation met with in the recent form, and very probably also in the fossil, shows that the difference is much less than it seemed to be at first sight, and very probably the extreme variations of the two forms closely approach. |
