PHILOSOPHY OF ZOOLOGY. 



In the Molluscous, Annulosc, and Radiated animals, no 

 organs of smell have been detected, analogous to those 

 which exist in 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 OF 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 papillae, and kept continually moist 

 by the saliva. The sense of taste is not confined to any 

 one part of the month ; 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 papilla 3 . 



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 Ixxlies moistened pro- 



