Infect with Net-like Arms . 
cade where he had feen them firft. He 
carried feveral of them home very carefully 
in a Phial, but in two Days moft of them 
were dead, and the reft having lpun them- 
felves thin tranfparent Cafes, (which were 
faftened either to the Sides of the Glafs, or 
to Pieces of Grafs put into the Phial with 
the Water,) became changed into what he 
fuppofes a Kind of Chryfalis, of which a 
Front-View is given N° xi, and a Side-View 
1 ST 0 x 11. But before their taking this Form, 
he perceived them fometimes in another 
Shape, different from the ftrft defcribed, and 
fuch as is fhewn N° x ; which, he fays, was 
the Figure they appeared in when they 
were weary with catching their Prey, or lay 
in wait for it. 
None of them lived more than three Days: 
and 5 tis remarkable, that notwithftanding 
frelh Water was giveti them two or three 
Times a Day, yet in a few Hours it would 
ftink to a Degree fcarce conceivable, and 
that too at feveral Yards Diftance, tho’ in 
proportion to the Water all the included In- 
fedts were not more than as i to 1,150,000. 
—-How exquifitely fubtile and minute 
muft the Effluvia from the Bodies of tbefe 
little Animals be, that can fo foon and fo 
ftrongly infedt fuch Quantities of Water and 
Air! This perhaps makes it neceffary for 
them to live in a rapid Stream, left they 
ffioald be poifoned with their own Perfpi- 
ration* 
