5<iO SEMINAL VERMICULI. il« 



vifcous fubftance. Being diluted with common 

 water, they all began to traverfe the liquid. As 

 it was at perfe£t reft, and no external caufe ap= 

 pearing to aft upon the corpufcula, I was inclined 

 to think this motion fpontaneous and peculiar to 

 them. My opinion was afterwards confirmed by 

 difcovering the efficient caufe of motion. With 

 iledfaft attention, two rows of minute points on 

 the fides of the appendage were Obferved moving 

 like moft minute oars, fig. 7. and then it was that 

 tile fituation of the corpufcle changed ; but when 

 their motion ceafed, it alfo ceafed to move. 



When the mixture of femen and water dried 

 up, the motion of the corpufcula was irrecover- 

 ably loft, though again wet with frefh fluid. 



Similar experiments were repeated on femen 

 taken from the tefticles of other newts, and with 

 the fame refults ; but, on diluting it, the corpuf- 

 cula often collefted in numbers, placed them- 

 felves parallel to each other, and bent into a cir- 

 cle. When all collefted, they bent themfelves 

 fo much that the point of each appendage almoft 

 touched the oppofite extremity of the body. In 

 this pofition, they began to revolve round a com» 

 mon center like a reel, and continued for fome 

 time. 



1 found corpufcula not only in the tefticles of 

 <newts, but alfo in the vafa deferentia. Thefe veflels 

 refemble two very white little pipes, running along 



rhe 



