RISE AND PROGRESS OF ZOOLOGY. H 



formerly entertained concerning those that were 

 known. 



Geetze, Werner, Fischer, Bloch, and Rudol- 

 phi, have greatly extended our knowledge of 

 intestinal worms, creatures so remarkable from 

 the necessity which obliges them to inhabit the 

 interior of other animals. 



There have been always much fewer general 

 works in the animal, than on the vegetable 

 kingdom, and the reason is obvious ; animals 

 in number, complication, and diversification 

 of structure so immeasurably exceed plants, 

 as to render it most difficult, if not abso- 

 lutely impossible for one man to bestow a 

 sufficient study on them all. To speak of the 

 execution of any of these works, would, in us, 

 be deemed invidious, and anything we have to 

 say, respecting their methods of arrangement, 

 must be reserved for that particular part of our 

 subject. 



Animals more seldom present us with new 

 objects of utility than vegetables, because 

 we have much less power over them, and are 

 more destitute of the means of appropriating 

 their existence to our peculiar uses. Still, 

 during the period of which we speak, both 

 the food and raiment of mankind, might have 

 been augmented by new discoveries in the ani- 



