Of an Animalcule or f mall livwg creature, zvhich is fometimesfound in 

 the livers of Sheep and other beajls. 



O make my obfervatioiis on this fiibjedl the more intelhgi- 

 ble, I fliall place them in the following order : Firft, as to the 

 fliape and make of this animalcule ; Secondly, the part of the intef- 

 tines where it is found ; Thirdly, its numbers, and the manner of 

 its propagation ; and Fourthly, how thefe creatures, and other ani- 

 malcules of a fimilar nature, by fixing themfelves in the liver and 

 other internal parts of the body, can produce certain difeafes, and 

 their fatal confequences. 



Firft, as to the fliape and fize of this creature, and its fimilitude 

 to other known animals ; it bears a near refemblance (in miniature) 

 to our fole or flounder, as appears ^y fig- A, which reprefents it of 

 the fize it is commonly found ; this figure fhew^s the back or promi- 

 nent fide; and/^. B, the belly, or flat fide of it. C is one of the 

 young of the fame fpecies, fliewing the back, D the belly of the 

 fame ; E and F are figures of the fame creature, fomewhat magni- 

 fied, and fhewn in the pofitions before mentioned. 



Thefe animals are not often feen alive, becaufe the difeafe they 

 produce does not always fliew itfclf by outward tokens, and the 

 beafl: affli6led with them, fometimes feems fat and in good health, 

 and then the liver is not perhaps examined till fome time after the 

 beafl: is killed ; and fhefe creatures cannot endure cold, but if by 

 being expofedto it they are.deprived of motion, they will revive, if 

 the liver be held in a warm hand or put into warm water. Their mo- 

 tion is undulating or wriggling like that of the fiflies before men- 

 tioned, their colour a yellowifli brown, the belly quite flat, and 



a 



