92 Transactions —Zoology. 
being free half-way up the crest, and others more or less free to the crest itself. 
The lower process of the atlas, or first, entirely wanting ; that of the second, 
large, thick, but compressed and truncated at the end, but probably in process 
of growth about as prominent as the upper process of the first. The lower 
process of the third, well developed, elongate, straight, much compressed, and 
truncated at the end ; about one inch shorter than the large process of the second. 
The bodies of the fourth to the seventh vertebrae without any indications of 
inferior lateral processes. 
The bodies of the third to the seventh vertebre, very thin, not much more 
than half the thickness of that of the first dorsal vertebra, which is anchylosed 
to the last cervical vertebra. The neural arch and upper lateral process, which 
is similar in form to that of the last cervical vertebra, but much thicker and 
stronger, is entirely free. The articulating surface of this vertebra is nearly 
circular, being only a little wider than high. The front of the neural canal is 
nearly circular, but rather depressed—that is, a little wider than high, but 
regularly rounded. The canal at the hinder end of the vertebral mass is larger, 
rounded, but with a rather triangular top, and a little wider than high. 
The first rib has a single head, and is wider at the sternal end. 
The sternum is oblong, rather irregular in shape and thickness, being 
thicker on one side than the other, very spongy or rather—full of cylindrical 
tubular cavities. There are three convex cylindrical prominences of nearly 
equal size, placed without any apparent order, on its thick margin. It is rather 
curved, the surface is flat, but the lower one is rather distorted by the unequal 
thickness of the bone. It is 61 inches long, and about 5 inches wide. 
The scapula is triangular, with a rounded end, rather broader than long— 
that is to say, 25 inches high and 27 inches broad at the widest end. The 
front margin has a broad compressed acromion process, which is bent towards 
the articulating surface and acute at the end, with a large arched outline 
which occupies about half the front margin. The disk of the outer surface is 
concave, with a large concavity in the middle of the upper half. The inner 
surface is nearly flat. There is no doubt that this bone is in process of 
development, for the terminal edge is very thick and truncated. 
MACLEAYIUS AUSTRALIENSIS. 
Macleayius australiensis, Gray, Cat. Seals and Whales, p. 105, figs. 
10 and 11; p. 371, figs. 74 and 75, from Krefft’s photographs. Suppl. 
Cat. Seals and Whales, p. 46. Synopsis of Whales and Dolphins, p. 2. 
Inhabits Australian seas (Krefft) ; coast of New Zealand (Haast). 
Skeleton in the British Museum. 
Hips QUE hel 
s er PR MTS Nu erbe olay EIE 
