472 



Microscopical Essays. 



difappear, their thin and tranfparent forms blending as it were 

 with the water in which they fwim. 



Small drops of infufed water are often fo full of thefe, that it 

 is not eafy to difcover the lead empty fpace, fo that the water it- 

 felf feems changed into another fubftance lefs tranfparent, but 

 confifting of an innumerable number of globular points, thick 

 fown together. In this a motion may be perceived, fomething 

 fimilar to that which is obferved when the fun's rays mine on the 

 water, the animalcula being violently agitated, or in a commo- 

 tion like unto a hive of bees. It is very common in ditch water, 

 and in almoft all infufions, both of animal and vegetable 

 fubftances. 



2. Monas Atomus. 



Monas albida pun&o, variabili inftru&a, Plate XXV. Fig. u 

 White mona, with a variable point. 



This animalculum appears as a white point, which, when it is 

 highly magnified, is fomewhat of an egg fhape ; the fmaller end 

 is generally marked with a black point, the fituation of this is 

 fometimes varied, and found at the other end of the animalcu- 

 lum; fometimes two black points are to be feen crofling the 

 middle of the body. 



It was found in fea water that had been kept the whole winter ; 

 it was not, however, very fcetid ; there were no other animalcula 

 in the fame water. 



3. Monas 



