190 
two inches eight lines; the relative position of the depression being the same as in the 
Apteryx. 
The distal trochlear or condyloid extremities of the three coalesced metatarsals ter- 
minate at different distances from the proximal ends of the bones, the outer one being 
the shortest—not the inner one, as in the Apteryx ; and the middle one, as in most birds, 
being the longest and the most prominent one anteriorly. The inner trochlea (11) pre- 
sents a depression on its inner surface and another on its under surface, from which a 
shallow channel is continued a little way backwards upon the back part of the condyle 
and forwards upon the broad anterior convex articular surface: this surface slopes 
obliquely from the outer to the inner margin of the trochlea: the inner part of the hinder 
surface of the trochlea is the most produced: the outer surface of the condyle presents 
a wide and deep depression. 
The articular surface of the middle trochlea is narrowest at its posterior commence- 
ment, gradually expands to its lower and fore part, and contracts, but in a less degree, 
to its anterior boundary: it describes three-fourths of a circle, and is grooved along its 
middle, the groove widening towards the posterior part of the bone. The outer portion 
of the posterior boundary projects from the level of the short stem of the condyle: the 
anterior boundary rises very gradually but somewhat obliquely from the level of the 
stem: the sides of the condyle are widely and deeply excavated for the lateral ligaments. 
The outer trochlea (rv) has a deep and rough depression on its narrow outer side, 
and a wider depression on the side next the middle condyle ; but it is not impressed on 
its under surface. The articular surface slopes from the inner to the outer side; it is 
moderately convex, with a faint median channel at its under part. The fore part of the 
stem of this condyle presents a transverse groove between two transverse ridges. The 
outer and hinder border of the trochlea is produced backwards. The rudimental meta- 
tarsal of the hallux is figured of its natural size at fig. 1, and in figs 4 and 5, Pl. XLIX. : 
it is of arhomboidal form, is subcompressed, with its lower end enlarged and convex for 
articulation with the proximal phalanx of the hallux. ‘The opposite end of the bone is 
obliquely truncate and roughened for the attachment of the ligaments which connected 
it with the similarly rough articular depression on the entometatarse (11). The outer 
and anterior surface is slightly convex ; the inner and posterior surface is concave length- 
wise: the bone is slightly twisted upon itself, this character being best shown by the 
direction of the inner and longer border of the bone. It is longer in proportion to its 
breadth than in the Apéeryxz, and it doubtless supported, as in that genus, a small 
proximal phalanx terminated by an ungual one: the convex articular surface is im- 
pressed by a shallow longitudinal groove, indicative of a trochlear articulation with the 
phalanx. 
The phalanges of the three anterior toes are present in the same progressively in- 
creasing number in the Palapteryz as in birds generally. The proximal phalanx (11, 1) 
of the second toe is distinguished from that of the third (middle) toe by the unsym- 

