Ml CROSCOPICAL 



Essays, 



473 



3. Monas Punclum. 

 Monas nigra. A black mona. 



A very minute point, folid, opake and black, round and long. 

 They are difperfed in the infufion, and move with a flow waver- 

 ing motion ; were found in a foetid infufion of pears, 



4. Monas Ocellus* 



Monas hyalina pun&o centrali notata. Tranfparent like talc., 

 with a point in the middle. 



The margin black, and a black point in the middle ; it moves 

 irregularly, is found in ditches covered with conferva, and fre- 

 quently with the cyclidium milium. 



5, Monas Lens. 



Monas hyalina. Tranfparent mona, of a talcy appearance. 



This is among the number of the fmaller animalcula, nearly of 

 a round figure, and fo pellucid, that it is not poffible to difcover 

 the leaft veftige of intefiines. Though they may often be feen 

 If ate, yet they are more generally collected together, forming 

 a kind of veiicular or membranaceous mafs. Contrary to the 

 c\ m of other animalcula, they leek the edges of the eva- 

 porating water, the confequence of which is aim oft immediate 

 de< hv When the water is nearly evaporated, a few dark (hades 

 are oerceived, probably occafioned by the wrinkling of the body. 



3 M Allow 



