discovered at Port Phillip . 
20D 
transverse prominence, covered also with enamel, which runs 
parallel to the facet. The two ridges are united by an isthmus 
of crusta-petrosa, so characteristic of the Mastodons. The 
largest of the molar teeth measured one inch eight lines 
transversely, and in an antero-posterior direction one inch six 
lines. The length from the summit of the crown to the ex¬ 
tremity of the fang in the largest specimen, was three inches 
six lines. 
The discovery of half an inferior maxillary bone with the 
teeth in situ, gives the following dental formula : — Incisors 
canines molars but this requires other confirmatory 
observations. 
The enamel is arranged (with a very trifling difference) as 
in the European and American species of Mastodon, the 
mamilloid character of the teeth only being wanting ; but the 
two incisors in the lower jaw, and the isthmus of crusta- 
petrosa uniting the bases of the angular ridges of the molars, 
are highly characteristic of the Mastodon. 
The largest bone, which appears to be the shaft of a femur, 
has unfortunately both its articular extremities broken off; 
but, from its broad and flattened character, it must have 
given support to a ponderous carcase. Its broadest part 
measured ten inches in circumference. 
The portion of scapula is also a large and strong bone, but 
so much mutilated as to have lost its features. 
Molar and incisor teeth, with other bones of a very large 
species of kangaroo, exceeding by one-third at least the 
largest individual of the present Macropus major, are abun¬ 
dant. The fossil is probably identical with that found in 
the Wellington caves by Sir Thomas Mitchell, and called by 
Professor Owen, Macropus Titan . Two incisor teeth of a 
huge rodent were also found amongst these bones. 
These remains were discovered in a small marsh about five 
feet beneath the surface, embedded in a layer of dark allu¬ 
vium, about a foot in thickness, upon which are super-im- 
s 
VOL. II. NO. VIII, 
