1894.] 



IX THE BRITISH MUSEUM. 



113 



1 cm. thick in the middle of the shaft, where the spongy bone is 

 wanting ; above and below this point the wall becomes thinner 

 and the bony network more developed. 



A left fibula, broken at the lower end, probably belongs to 

 the same species. It is compressed from side to side to a rather 

 greater extent than the fibula of Dinornis, and consequently 

 its surface for articulation with the femur is narrower. The 

 tuberosity for the insertion of the biceps cruris is very strongly 

 developed, and the distance from it to the upper end of the bone 

 is 19 cm. The greatest antero-posterior width of the upper end 

 is 7*5 cm. ; the width of the articular surface from side to side is 

 2-7 cm. 



A very imperfect proximal end of a left tarso-metatarsus, from the 

 same locality, measures 17*5 cm. across and probably belongs to 

 2E. titan. 



Among the femora that are provisionally referred to the same 

 species, there is one (figs. 1 & 2, a, pp. 114, 115) from the left side 

 nearly complete, wanting only the upper end of the trochanter 

 and some portion of the condyles. Its dimensions are : — 



Approximate length 



Circumference of the shaft at 

 the narrowest part 



Width from side to side at the 

 same point 



Width of distal end (approxi- 

 mate) 



M. titan. 



cm. 

 410 



27-3 



9-2 



21-0 



M. maximus. 



cm. 



320 



(? true length) 



27-0 

 94 » 

 19-0 (?) 



M. Mldebrandti, 



cm. 



15-8 



5-0 



100 



The neck is short and thick, measuring 23 cm. in circum- 

 ference ; its anterior surface is very rugose. The trochanter is 

 very massive ; its smooth upper surface for articulation with the 

 anti-trochanter of the ilium slopes steeply upwards and outwards 

 from the neck, widening rapidly, and it must have risen consider- 

 ably above the head, but the upper end being abraded it cannot bo 

 determined to what extent this was the case. The anterior surface 

 of the trochanter does not appear to have projected forward so 

 much as in Dinornis. 



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

 large pneumatic foramen, the edge of which is unfortunately 

 broken, so that its size cannot be accurately determined. This 

 opens into a wide thin-walled passage, measuring 3 cm. from side 



1 This meuurement ia taken from a cast in the J5ritisli Museum. 



Proc. Zool. Boo.— 1894, No. VI 1 1. 8 



