158 ON FOSSILS FROM NEW ZEALAND 
Of these, the innermost is the strongest and longest ; and a deep 
groove divides it from the two middle ones, which are separated by 
only a very shallow concavity. The outermost ridge prolongs the 
outer edge of the outer articular facet, with which it is continuous, 
downwards and inwards, upon the posterior aspect of the tarso- 
metatarse. Continuing the direction of this ridge, but in addition 
passing into the outer of the two median ridges, is a strong oblique 
“linea aspera” which passes downwards and inwards to the proximal 
end of the broken-off inner division of the distal end of the bone. 
On the distal side of this ridge, and in the same line with the outer 
median calcaneal ridge, is the posterior end of an oval foramen about 
Fig. 1.-- Front view of the right tarso-metatarse Fig. z.—Back view of the same bone 
of Paleeeudyptes antarcticus. Nat. size. (fig. 1). Nat. size. 
ith of an inch in diameter, which completely traverses the metatarse. 
Below the ridge, internally, is a shallow, but broad, depression or 
fossa, which separates it from the middle of the three trochlear 
condyles into which the distal end of the bone, when entire, was 
divided. 
The anterior face of the bone (fig. 1) presents a very different 
aspect. Its upper fourth or fifth overhangs the rest, especially on the 
inner side, where two short parallel ridges are seen running downwards 
and inwards. The outer and weaker of them ends superiorly in the 
anterior interarticular tuberosity which was mentioned above. Below 
it gives off a transverse crest inwards, which subsides before it reaches 
the inner of the two ridges. On the outer side of, and extending 
