to it by certain
peculiar appearances of subsidence and disruption, and by yawning holes
in the surface, which previous experience had taught me to consider as
indications of its existence.

On entering one of these fissures from the bed of the little stream near
Buree and following, to a considerable distance, the subterraneous
channel of the rivulet, we found a red breccia containing bones as
abundantly as that of Wellington Valley. It occurred also amidst masses
of broken rocks, between which we climbed until we saw daylight above
and, being finally drawn out with ropes, we emerged near the top of a
hill from a hole very similar in appearance to the mouth of the cave at
Wellington, which it also resembled in having breccia both in the sides
of the orifice and in the surface around it.

AT MOLONG.

At Molong, 36 miles east of Wellington Valley, I found some concreted
matter within a small cavity of limestone rock on the surface and, when
broken, this proved to be also breccia containing fragments of bone.

SHATTERED STATE OF THE BONES.

It was very difficult to obtain any perfect specimens of the remains
contained in the breccia--the smallest of the various portions brought to
England have nevertheless been carefully examined by Professor Owen at
the Hunterian Museum, and I have received from that distinguished
anatomist the accompanying letter containing the result of those
researches and highly important determinations by which he has
established several points of the greatest interest as connected with the
Natural History of the Australian continent.

IMPORTANT DISCOVERIES BY PROFESSOR OWEN.

Royal College of Surgeons, May 8th, 1838.

Dear Sir,

I have examined, according to your request, the fossil remains which you
discovered in Wellington Valley, Australia, and which are now deposited
in the Museum of the Geological Society; they belong to the following
genera:

GIGANTIC FOSSIL KANGAROOS.

MACROPUS Shaw.

Sp. 1. Macropus atlas. O. This must have been at least one-third larger
than Macropus major, the largest known existing species: it is chiefly
remarkable for the great size of its permanent spurious molar; in which
respect it approaches the subdivision of Shaw's genus, called
Hypsiprymnus by Illiger. The remains of this species consist of a
fragment of the right ramus of the lower jaw. (I*) Figure 1 Plate 47.

(*Footnote. The numbers and letters within a parenthesis in this letter
refer to la