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Show 114 MR. C. W. ANDREWS ON REMAINS OP MPYORNIS [Feb. 6, to side and 1'5 cm. from before backwards, which passes down to about the middle of the shaft, where it terminates in the bony reticulum with which the bone is nearly filled. This pneumatic foramen, though present in most Batites, is entirely wanting in Dinornis and Apteryx. The shaft is narrowest about 12 cm. below the upper surface of the neck, where it is oval in section, the short diameter being antero-posterior. Below this point the flattening increases, and just above the condyles the anterior surface is only slightly convex from side to side. Fig. 1. a. Left femur of Mpyornis titan (?), from front. b. „ „ Mpyornis (?), from front. Both I nat. size. The popliteal fossa is large and triangular in shape, its lower border being formed by the inner condyle and a strongly projecting rounded intercondylar ridge, the inner by a rough ridge terminating above in a blunt tubercle, while its outer boundary is not well defined, since the floor of the fossa slopes gently up, passing |