OF ANIMALCULES. 35 



15. MoNAS eruhescejis, E. 7'he glowing Monad. — A new 

 species, measuring l-1728tb of an inch. 



16. MoNAS hyalina, E. The diaphanous Monad. — A 

 new species, measuring from l-6000th to 1 -2880th of an 

 inch. 



17. MoNAs kolpoda, E. The bosom Monad. — A new 

 species, measuring only l-10,320th of an inch. 



18. MoNAS ovalis, E. The egg-shaped Monad. — A new 

 species 5 size, 1 -9600th of an inch. 



19. MoNAS polytoma, E. The indented Monad. — A 

 new species, the largest of this genus ; I- 1100th of an 

 inch. 



20. MoNAs umbra, E. The clouded Monad, — A new 

 species, size 1 -2400th of an inch. 



21. MoNA s xjo/dox, E. The revolving Monad. — A new 

 species, found at Petersburgh, from l-3456th to 1- 1728th 

 of an inch in diameter. 



