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XX. Particulars respecting the anatomy of the Dugong, in- 
tended as a Supplement to Sir T. S. Raffles’ Account of that 
animal. By Sir Everard Home, Bart. F. R. S. 
Read June 29, 1820. 
Sometime after Sir Thomas Stamford Raffles’ paper on 
the Dugong was laid before the Society, I received from him 
a young female of that animal, four feet six inches long, 
and the viscera of a male, eight feet long, preserved in spirit, 
with the bones dried. 
From these materials I have selected the most interesting 
facts that came under my observation, not adverted to in Sir 
Thomas Stamford Raffles’ description, and now lay them 
before the Society, to render the account of this most ex- 
traordinary animal as complete as it is possible for me 
to do. 
The external form of the animal was in sufficient preser- 
vation to enable Mr. Clift to give a representation of it, 
which is annexed, (PI. XXV.) 
Although the tusks, as well as the mode of shedding them, 
have been described in a former paper, the skull of the small 
dugong furnishes farther materials respecting the teeth of 
this animal. It has two incisors in the upper jaw immedi- 
ately before the two milk tusks ; these are more advanced 
in the gum than the tusks ; and therefore, would appear 
before them. The gum covering the alveoli was very thick, 
