210 PHILOSOPHY OF ZOOLOGY. 
In the Molluscous, Annulose, and Radiated animals, no 
organs of smell have been detected, analogous to those 
which exist m the more perfect animals. They, however, 
appear to possess this sense, and to be guided by its inti- 
mations in seeking out the proper kinds of food, their mates, 
and a situation to deposit their eggs. In some cases, they 
are deceived by the resemblance between the smells of sub- 
stances very different in other qualities. Thus, some plants 
emit a cadaverous smell, similar to putrid flesh, by which 
the flesh-fly is allured, and deposits its eggs on parts of 
these which can furnish no food to the future progeny. 
VI. SEnsE. or TAsTE. 
The sense of 'Taste resides in the mouth, and the organs 
destined for exercising it are analogous to those of touch. 
The skin, upon entering the mouth, becomes of a finer tex- 
ture, and is supplied by a greater number of bloodvessels 
and nerves than on the outside of the body. It is soft, 
covered by numerous papilla, and kept continually moist 
by the saliva. The sense of taste is not confined to any 
one part of the mouth; it exists in the cheeks, tongue, 
palate, throat, and perhaps gullet, being most sensible in 
those parts which are softest, and have the greatest number 
of papille. 
The nerves which are distributed to the mouth, take 
their rise from different branches of the fifth, eighth, and 
ninth pair. The peculiar office of each of these nerves is 
not distinctly understood, nor has it been demonstrated that 
they are all conducive to the perfection of the sense of taste. 
The bodies which excite the sensations connected with 
taste, require to be dissolved or mixed with the saliva of the 
mouth, and in this state applied to its integuments. It is 
not known how the particles of sapid bodies moistened pro- 
