INFUSORIA AND ALGJE. 11 



terest the intelligent reader in the subject, and we 

 will at once proceed to a more detailed history 

 of the peculiarities of Infusoria ; premising that 

 one family, the Desmidiea, which was by Ehren- 

 berg considered as belonging to the animal king- 

 dom, has, after much variety of opinion by natu- 

 ralists, been placed amongst vegetables, and con- 

 sidered as minute forms of Sea-weeds (Alga) \ 

 these will be described slightly in the sequel. 



After the first expense in the purchase of a 

 good microscope, amusement may be constantly 

 obtained at all seasons of the year, without any 

 trouble but that of procuring and selecting water 

 likely to contain animalcules, and they are mira- 

 culously abundant everywhere. Many people are 

 disgusted after viewing water through a micro- 



