114 



MB. C. W. ANDREWS ON REMAINS OF ^PTOENIS [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 

 Dinomis 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 

 irom 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 termi- 

 nating above in a blunt tubercle, while its outer boundary is not 

 well defined, since the floor of the fossa slopes gently up, passing 



