43$ Microscopical Essays. 



go forwards in a kind of fpiral line, and then in a little time come 

 back again to the reft. 



Fig. 40 reprefents a parcel of thefe vorticellse united together. 



Among the other authorities for this animal, M, Linnseus refers 

 to Mr. Baker's defcription of the mulberry infecl, " Employment 

 for the Microfcope," p. 348, which, as it differs a little from the 

 preceding account, we {hall infert here. That from which his 

 -drawing was made, and which he has defcribed, was found in a 

 ditch near Norwich ; he called it the mulberry infect, from the re- 

 femblance it bore to that fruit ; though the protuberances that 

 Hand out round it are more globular than thofe of a mulberry ; it is 

 to be feen rolling about from one place to another, and is proba- 

 bly a congeries of animalcula ; they are to be met with in differ- 

 ent numbers of knobs, or protuberances, fome having fifty or 

 fixty, others more or lefs down to four or five. The manner of 

 moving is the fame in all They are generally of a pale yellow. 



VoRTICELLA OPERCULARIA, FlG. 29, PLATE XXII. 



Vorticella compofita, floribus muticis ovalibus, ftirpe ramofa. 

 Compound, with naked oval florets, and a branched fterru 



Thefe vorticellae are of a lemon fhape, and are generally found , 

 in clufters, branching out from a Item, which moftly adheres to 

 fome convenient fubftance. 



That fpecies of them which is defcribed by Mr. Baker had a 

 very fhort pedicle, and the animals were much longer than thofe 



which 



