CLASS XIV. ORDER II. 131 



or oval* Iii infusions of hay and of some other 

 vegetables. 



BURSARIA, worm very simple, membranaceous, 

 hollow. In marshes. 



ENCHELIS, worm invisible to the naked eye, 

 very simple, cylindrical. In water long kept. 



BACILLARIA, (straw-thread,) body consisting of 

 cylindrical straw like filaments, placed parallel to 

 each other, and frequently changing their position. 

 In the ulva latissima. 



MONAS, (jelly-points,) worms invisible to the 

 naked eye, most simple, pellucid, resembling a 

 point. Smallest of all animalculse yet discovered. 

 In sea-water long kept, in fetid infusions of pears, 

 in most animal and vegetable infusions, and ia 

 clear pure water. 



VOLVOX, (globe jellies,) worm invisible to the 

 naked eye, simple, pellucid, spherical. In com- 

 mon water and in vegetable infusions. 



