———_————— ee ee 
216 
concave, sculptured by muscular impressions with intervening ridges, and by a defined 
oval rough tract between the head and the base of the trochanter. The eaten convex 
expanded surface of the trochanter is more strongly marked by the insertions of 
powerful tendons, surrounding an irregular smooth tract near the centre of the surface. 
The back part of the upper end of the femur in two of the specimens presents two or 
three small holes leading into the superficial cancelli, by which it is possible a little 
air may have been admitted into these cavities ; but this is a very feeble representation 
of the wide orifice and canal at the same part of the Ostrich’s femur which conducts 
directly to the large air-cavity in the body of that bone. 
The shaft of the entire femur of the Din. struthioides repeats the characters described 
and figured in the memoir above cited. The fore part of the external condyle begins 
to rise from the level of the shaft, about one-third from the distal end of the bone, and 
bends outwards, forwards and downwards, increasing in breadth and convexity, and 
forming the outer boundary of the characteristic broad rotular surface. The convex 
fore part of the inner condyle forming the inner boundary of that surface is shorter, 
and rises more abruptly. The deep oval fossa, above the vertical broad groove for the 
fibula, behind the outer condyle, is well-marked. The orifice of the medullary 
artery is at the middle of the back part of the shaft of the femur in two of the 
specimens, 
With regard to the metatarsus of the Dinornis struthioides, the same satisfactory 
confirmation of the species has been received, as in the case of the femur, by the 
addition of three specimens repeating the characters of the original bone described at | 
p. 81, and figured in Pl. XXVII. fig. 2. One of these specimens, kindly sent to me 
by J. R. Gowen, Esq., F.G.S., Sec. H.S., was discovered in the tertiary deposits at 
Waikawaite, Middle Island of New Zealand, and has the two extremities more entire 
than in the original specimen figured. The middle of the distal trochlea is impressed 
by a shallow groove running its whole length, and becoming more shallow as it 
approaches the contracted back part of the trochlea, which terminates abruptly, 
projecting beyond the level of the back part of the distal end of the bone. 
A second of the additional specimens of the metatarsus of the Din. struthioides 
was obtained by the Rev. Wm. Cotton, M.A., at Tarawaite, in the North Island of 
New Zealand: a third specimen (Pl. LIV. fig. 4) was discovered by Governor Sir 
George Grey, C.B., in a cave in the district which lies between the river Waikate and 
Mount Tongariro, in the North Island. 
From the same cave Sir George Grey likewise obtained and very liberally trans- 
mitted to me, with a most valuable collection of other bones of Dinornis and Palapteryz, 
an entire tibia (PI. LV. fig. 2) agreeing with the portion of shaft, which, from the 
dimensions given in p. 137, I was induced to refer to the Dinornis struthioides, since it 
differed in its size and proportions from all the tibiz previously described and referred 


