GO 
MACROPODIDA3. 
timate molars, showing the crowns much worn by mastication: 
the crown of the last molar has been broken oft’ and there are 
the remains of two molars anterior to the antepenultimate 
one; the extent of the four posterior molars is 1 inch 10 
lines; the penultimate molar, besides its inferior size, differs 
from the corresponding tooth in if . Atlas in being narrower 
in proportion to its length, in having a relatively smaller talon 
and no posterior one ; it differs, a fortiori , from the ante¬ 
penultimate molar of the M. Titan, inasmuch as this has a 
larger proportional anterior talon than in the if. Atlas. The 
teeth and the jaw of this specimen closely agree in size with 
those of the large male Macropus hunger , but the inner 
lobes of the penultimate molar are thicker in the fossil, and 
the jaw does not swell out so much on the outside of the 
alveolus of the last molar ; there is also a longitudinal inden¬ 
tation on the outside of the alveolar process of the anterior 
molars. The present fossil, therefore, indicates either an 
extinct species of the size of the existing M. hunger , or it 
may have belonged to a female of a third gigantic extinct 
species.' 1 It is from the newer tertiary deposits in the bed of 
the Condamine River, west of Moreton Bay, Australia. 
Amongst the specimens from the caverns of Wellington 
Valley, presented by Count Strzelecki to the College of 
Surgeons, the author noticed fragments containing molar 
teeth nearly corresponding in size to those of M. Theiidk, and 
others which must have belonged to Kangaroos as small as 
the M. leporoides. 
There were also fragments which are clearly referable to 
the genus Hypsiprymnus ; upon these arc founded the— 
Hypsiprymnus spelter/* , Owen : Catalogue of the Fossil 
Organic Remains, &o., p. 332. 
No. 1537 of the Catalogue mentioned is a fragment of the 
