NATURAL HISTORY. 
850 
to be meant by the Creator as the air crab ; 
and adapted to the light element, in the 
fame proportion as the fea crab is adapted 
for the water. 
Genus VIII. 
A R A N E 4. 
Chars'Mcr, 
T 
J. niS infeifl; has eight feet, as many eyes, 
a mouth armed with two crotchets, tvvo 
fpiral tongues ; and the bottom of the abdo- 
men has two Inftruments, like nipples, adapt- 
ed for fpinning. 
, Of thefe infefis there are many diilerent 
fpecies. I hat which mollly dillinguinies 
the fpjder, is the manner of forming its 
web flie fird choofes a place where there is 
a cavity, that Ihe may have a clear paffage, 
to pafs freely on each fide, and to efcape oc- 
cafionally. She begins, by dropping on the 
.wall fome of her gnin ; to w'hich flie attach- 
es her fil'd thread, wdiich lengtJiens as die 
paifes to the other fide, to which die fixes 
the thread in a fimilar manner : thus die 
pades and repalfes, from fide to fide, until 
die has made what may be termed the warp 
of her web, exactly the fize die intends it 
Hiould be, or which die thinks will anfwcr 
her 
