#uJ!icient to bring forth, in an instant, the latent Larva. At this 

 time, if the tongue of the Horse touches the Egg, its Operculum is 

 thrown ©pen, and a small active Worm is produced, which readily 

 adheres to the moist surface of the tongue, and is from thence con- 

 veyed with the food into tlie stomach. 



I have often (he adds) with a pair of Scissars, clipped off some 

 h^s with the Eggs on them, from the Horse, and on placing them 

 in the hand moistened with Saliva, they have hatched in a few se- 

 conds. At other times, when not perfectly ripe, the Larva would 

 not appear, though held in the hand under the same circumstances 

 for several hours, a sufficient proof that the Eggs themselves, are 

 not conveyed to the Stomach.'* 



The number of Bots found in the stomach of the Horse, some* 

 times exceeds a hundred, but Mr. Clarke is nevertheless inclined to 

 think, that the quantity of sustenance which they consume must be 

 comparatively small, both on account of the slowness of their growth^ 

 and the great purity of their food, which he supposes to be the Chyle. 

 — Now as to the extreme purity of their food, this cannot at any 

 _rate be the case, ivith such Bots as are confined to the stomach, (anc^ 

 rarely indeed does it happen that they are found in the intestines) 

 inasmuch as this peculiar fluid the Chyle, is not elaborated in that 

 organ . 



Nor can it even, by any means be satisfactorily proved, that the 

 food of the Bot consists of that substance merely, which the food of 

 the Horse is converted into, by the digestive powers of the stomach> 

 namely the Chyme ; although 1 am free to acknowledge the extreme 

 probability of such a notion. Most of the facts and phoenomcna 

 indeed, which are known concerning Bots, militate strongly against 



M 



