Mic ros copic At Essays. 



483 



Is a final 1 roundifti tranfparent body, compofed of innumerable 

 molecules, homogeneous, pellucid, and of trie fhape of the moon 

 in it's full quarter, without any common margin. 



It is in a continual twofold motion ; the one of the whole mafs 

 turning (lowly round, the other of the molecules one among the 

 other. They are found in marfhy places in the beginning of 

 fpring. 



21. Vol vox Globator. 



Volvox fphaericus membranaceus. Spherical membranaceous 

 volvox. 



This is a tranfparent globule, of a greenifh colour ; the fcetus 

 is compofed of fmaller greenifh globules. It becomes whiter and 

 brighter with age, moves flowly round it's axis, and may be per- 

 ceived by the naked eye. 



But to the microfcope the fuperficies of this pellucid membrane 

 appears covered with molecules, as if it were granulated, which 

 has occafioned fome obfervers to imagine it to be hairy ; the 

 round pellucid molecules that are fixed in the center are generally 

 larger! in thofe that are young. The exterior molecules may be 

 wiped off, leaving the membrane naked. 



When the young ones are of a proper fize, the membrane 

 opens, and they pafs through the ft {fare ; after this, the mother 

 melts away. They fometimes change their fpherical figure, the 

 fuperficies being flattened in different places. 



3 N 2 Moft 



