MO NOTRE MATA. 
2‘J 
Mr. Bennett informs us, is Mnllagong and Tambreot; but the 
latter is the most common appellation with the Aborigines of 
New South Wales. 
The most striking feature in the structure of the Omithor- 
hyuchus is the beak-like face; a peculiarity which suggested 
the generic name given by Blumenboch, and which, in com¬ 
bination with the broad flat foot, likewise suggested to Shaw 
the name Duck-billed Platypus, or Platyjiu* anatinmt. The 
head is rather small, but the facial bones are much developed, 
and, together with those of the lower jaw, form a framework 
which is covered with u thick naked skin. The beak is much 
depressed, about one-third longer than broad, and broader in 
front than behind: the skin with which it is covered is in the 
living animal of a greyish-black colour, and covered with 
innumerable pores; but both at the front and sides of the 
beak is a free portion of the skin, which is uniformly smooth 
and flexible. 
Fig. 2. Fig. 1. 
Fore |>art of the upper and under jaw* of the Ornithorhynchus, showiug the 
inner side of the beak-likc jaws. 
Fic. 1. The upper jaw. 
a. The homy molar teeth. 
b. Long, narrow, anterior homy teeth. 
d. Free portion of the integument projecting from the jaw. 
Fig. 2. The lower jaw. 
a. The horny molar teeth. 
1. Narrow, anterior horny teeth. 
c. Transverse ridges on the leather-like covering of the beak. 
e. The tongue. 
