142 PROFESSOR OWEN ON THE GENUS DINORNIS. 



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. 240, and figured in pi. 27. fig. 2. of my memoir of 1843. 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 extre- 

 mities 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 ter- 

 minates 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 (Pi. XLI. 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 Palapteryx, 

 an entire tibia (PI. XLII. fig. 2) agreeing with the portion of shaft, which, from the 

 dimensions given in vol. iii. p. 329, I was induced to refer to the Dinornis struthioides, 

 differing in its size and proportions from all the tibise previously described and referred 

 to other species, but -presenting similar relations of size to the femur and metatarsus 

 of the Din. struthioides, which the previously described tibiae have presented to the 

 other bones of the leg of the respective species to which those tibiae have been 

 referred. 



I conclude, therefore, that in the tibia transmitted with the metatarsus of the Din. 

 struthioides by Sir George Grey, I possess the bone, which I have been so long desirous 

 to obtain in order to complete the leg of the Din. struthioides. Like the metatarsus 

 above-cited, it is from the left side, and they appear to have belonged to the same 

 individual bird. 



