NATURAL HISTORY. 
ARGYRONETA. Agvatica. (Latr.) It lives in 
ponds and slow streams, forming a curious web 
beneath the water in which it lives surrounded 
by a globule of air formed by itself—it dives to 
the bottom for its prey. 
ATYPUS. DISDERA. EPEIRA. and several 
other genera of the natural family of ARANEIDES, 
have been formed by Latreiile, Leach, and other 
eminent naturalists cut of the Linnean genus 
ARANEA, familiarly known as spiders—they 
agree in many of their general characters, all have 
six or eight immovable eyes, each of which con- 
sists of a single lens, so that they can only see in 
particular directions—they cast their skins fre- 
quently, and for a minute description of the 
mode in which this is accomplished, we are 
indebted (at least as respects one species) to the 
late Sir J. Banks. Amongst the smaller animals, 
they are what the Ferw, and the Accipitres are 
amongst the quadrupeds and birds, 
ORDER 3. PODGSOMATA, 
Animals with a four-jointed body, tubular mouth, 
four eyes placed on a comuion tubercle, and eight 
articulated legs, Their proper situation is still 
unsettled: they compose a singular group of marine 
animals—the female carrying the eggs in round 
masses under the base of the rostrum; they formed 
part of the genus Hydrachna, of Linneus, 
PYCNOGONUM. Baxrznarvum. (Latr,) Taken 
