[ 37 1 



any found with their mouth ; but for 

 thispurpofe, fome ufe their feet, others 

 their wings, and others, fome elaftic 

 inftrument with which they are na- 

 turally furnimed. Mofl infects have 

 two eyes, but the gyrinus has four, the 

 fcorpion fix, the fpider eight, and the 

 fcolopendra three. They have no eye- 

 brows, but the external tunic of their 

 eyes is hard and tranfparent like a 

 watch-glafs ; their eyes have no exter- 

 nal motion, unlefs it be in the crab. 

 They coniift. for the moft part of one 

 lens only ; but in thofe of the butterfly , 

 dipterae, and many of the beetles, they 

 are more numerous. Pugett difcover- 

 ed 17,325 lenfesin the cornea of a but- 

 terfly, and Lewenhoek, 800 in a fly* 



Antennae, plate r. a. Thefe are in 

 general two (unlefs 4 are allowed to 

 fome kind of crabs) and placed on the 



fore- 



