130 
Tn the femur of the robust variety of Dinornis ingens from the Middle Island, the upper 
tuberosity of the two posterior ones is nearer the lower than the upper end of the bone ; 
in the femur of the Din. ingens from the North Island it is nearer the middle of the shaft. 
In the Din. ingens from the Middle Island the inner contour of the femur descending 
from the head is less concave: the outer expanded surface of the proximal end of the 
bone forms an obtuse angle with the posterior surface, not a right angle, as in the Din. 
ingens from the North Island. In the Din. ingens from the Middle Island the great tro- 
chanterian ridge extends more boldly out, its contour is more convex, and it is relatively 
larger, The same may be observed with regard to the antero-external prominence of 
the outer condyle: the length of shaft included between the lower end of the trochan- 
terian prominence and the upper end of the external condyloid prominence is four inches 
nine lines in the robust variety, and five inches five lines in the femur from the North 
Island. 
The proportions of the tarso-metatarsal bone of the Dinornis ingens, as exemplified in 
the bone (Pl. XL. fig. 1) Sent by Mr. Colenso from the North Island, are nearly those 
of the Din. struthoides. In the tarso-metatarsal bone of Din. giganteus the antero-poste- 
rior thickness of the shaft is greater. The anterior surface of the upper half of the 
shaft, below the perforated depression, shows a slight longitudinal concavity in Din. 
ingens. ‘Towards the inner side of the posterior part of the lower half of the shaft there 
is a rough tract of three inches in length, and at its lower end a rough oval depression 
(ib, d), about one inch by nine lines. The surface in the tarso-metatarsal bone of the 
Apteryx for the attachment of the back-toe occupies the corresponding place: the 
Dinornis ingens therefore, by this mark of resemblance to the Apteryx, may belong to 
a genus (Pulapteryx) distinct from Dinornis, 'The accuracy of the reference of the tarso- 
metatarsal bone, m 2, in the preceding Memoir (p. 82) to a young individual of the 
Dinernis giganteus, is well-illustrated by the present bone, in which the shaft, from the 
perforated proximal anterior depression to the beginning of the clefts of the distal arti- 
cular trochlev, is precisely the same as in m2 ; the tarso-metatarsal in the Dinornis ingens 
manifesting all the characters of age, by complete confluence of its primitively distinct 
elements, as well as by the strong and rough lateral ridges for ligamentous and aponeu- 
rotic attachments ; whilst m 2, with the same length of shaft, shows, as described in the 
former Memoir, the still open fissures between the proximal ends of the three constituent 
metatarsals. 
The species, which I have called Dinornis casuarinus, 1s most satisfactorily determined 
by ten femora, five of the left and five of the right leg ; by eleven tibiz, five of the left 
and six of the right leg ; and by six tarso-metatarsal bones, most of which bones have been 
obtained from the Middle Island, at the locality and turbary deposit near Waikawaite. 
I have figured one of the bones of this species from the North Island in the prece- 
ding Memoir, viz. a mutilated femur (Plate XXIII. fig. 1), which I at first regarded as 
belonging to a young individual of the Dinornis struthoides, The acquisition of so man y 

