Ca 88 Fs) 
CLASS VII ARACHNIDA. 
Remarks. Animals of this class also were 
placed in the class Insecta by Linneus. They 
are truly insects; but constituting a numerous 
and interesting family of a peculiar character, few 
object to the separation. ‘The web of the spider 
attracted the notice of the earliest observers ; and 
it forms a subject of refference in the writings of 
Solomon. Were it not for that ridiculous affec- 
tation which causes the feigned screaches and 
screams so often heard at the approach of spiders, 
nothing in the whole round of natural science 
would be a more favorite subject of observation 
and study, than the instincts and structures of 
these beautiful and inoffensive animals. 
ORDER 1. PULMONARIA. 
Having hollow organs or sacks, in some measure 
resembling lungs, which subserve the purpose of 
respiration. 
AraneA, (spider,) legs eight; eyes eight or. 
six ; mouth furnished with two hooks or holders ; 
feelers two, jointed, the tips of which, in the male, 
distinguish the sex ; abdomen terminated by pa- 
pille or teats, through which the threads of the 
web are drawn. 
Scorpio, (scorpion,) legs eight, besides the two 
frontal claspers ; body ovate, elongated; eyes 
eight, three on each side of the thorax and two on 
the back; tail elongated, jointed and terminated 
by a curved pincer ; combs (toothed processes) si- 
tuated beneath, between the thorax and abdomen. 
