C W. Andrews — A New 8pecies of yEpyornis. 



19 



lateral surfaces have large pits for the insertion of ligaments, that in 

 the ectocondyle being about 2-5 cm. deep. Behind these pits are large 

 rough tuberosities. The intercondylar surface is only slightly 

 depressed, and, though faintly convex from side to side, does not 

 show the strong ridge figured by Burckhardt in ^. Hildehrandti. 

 The upper portion of the bone is too imperfect for description. 



The left femur, which is provisionally referred to the present 

 species, is nearly complete, only the upper part of the massive 

 trochanter and the anterior part of the condyles being lost. Its 

 dimensions are as follows : — 



Measurements of the femora of 

 uHlpi/ornis 



Approximate length 



Circumference of shaft at the narrowest 



part 



"Width of shaft at the same point 



Width of distal end (approximate) 



JE. titan. 



4r5 cm. 



27-3 



9-2 



21-0 



JE. maximus. 



32-0 cm. 

 ^? true length) 



27-0 cm. 



9-11 „ 



19-0 ,, 



^. mide- 

 hrandti. 



15-8 cm. 



5-0 ,, 



100 ,, 



The neck is short and thick, measuring 23 cm. in circumference ; 

 its anterior surface is very rugose. The upper articular surface of 

 the trochanter is flat and continuous with that of the head, from 

 which it slopes steeply upwards and outwards, widening rapidly. 

 The trochanter seems to have risen considerably above the head, but 

 does not form a crest strongly projecting forwards, as in Dinoi-nis. 

 On the posterior surface, near its junction with the neck, is a 

 pneumatic foramen, the exact size and shape of which cannot be 

 determined owing to the fracture of its edges. The passage into 

 which this foramen opens is very large, measuring about 3 cm. from 

 side to side and 1-5 cm. from before backwards; this runs down to 

 about the middle of the shaft, where it terminates in the complex 

 bony network with which the bone is almost entirely filled, as can 

 be seen in one of the smaller femora which is broken across. The 

 shaft is narrowest about 12 cm. below the upper surface of the neck ; 

 at this point it is oval in section, the short diameter being antero- 

 posterior. The flattening becomes much more pronounced as the 

 bone widens out towards the condyles, so that just above these the 

 anterior face is only slightly convex from side to side. The lower 

 portion of the posterior face is occupied by the popliteal fossa; this is 

 triangular in outline, the lower side being foi'med by a very strong 

 rounded intercondylar ridge, the inner by a rough border terminating 

 above in a blunt tubercle, while externally the side of the fossa 

 slopes gently up, passing imperceptibly into the posterior surface 

 of the shaft. Several pneumatic foramina open into this fossa, the 

 largest measuring 7 by 5 mm. The condyles, which are very 

 massive, are unfortunately somewhat incomplete. The outer projects 

 about 5 cm. beyond the inner and has a rough concave external 

 surface. The articulation for the fibula is narrower relatively than 



' This measurement is taken from a cast in the British Museum. It seems 

 probable that this femur does not belong to .^. maximus, but to the present species. 



