LECTURE XII. 





JL HERE exists a large tribe of animals to which 

 we have as yet paid no attention. These animals 

 are, in common language, termed Worms, and 

 constitute a particular division of the Order Vermes 

 in the Linnsean arrangement. Their forms are 

 various, and their natures extraordinary. The 

 major part of them are the inhabitants of living 

 animal bodies; their introduction into which is 

 one of those inscrutable mysteries which perhaps 

 must for ever evade the power of human intellect, 

 It is sufficient, at present* to say, that they exist 

 in most animals ; some kinds in the intestines, and 

 some in other viscera. I do not mean however to 

 pursue their history any further than is merely ne- 

 cessary, in order to elucidate the various divisions 

 of the Animal World. 



