410 
CLASS ARACHNIDA. 
Argyroneta, Latr. 
The jaws are inclined on the tongue, the form of which is 
triangular. The two eyes of each lateral extremity of the 
ocular group are very much approximated one to another, 
and placed upon a special eminence. The other four form a 
quadrilateral figure. Argyroneta ( Aranea aquatica , Lin., 
Geoff., Deg.) is of a blackish brown, with the abdomen deeper, 
silky, and having on the back four deep points. 
It lives in our stagnant waters, swims there, the abdomen 
being enclosed in an air-bubble, and forms there, as a retreat, 
an oval cocoon, filled with air, lined with silk, from which 
proceed threads, directed on all sides, and attached to the 
neighbouring plants. There it lies in wait for its prey, fixes 
its cocoon for the eggs, which it watches assiduously, and 
encloses itself in it to pass the winter. 
The second section of the sedentary and rectigrade spiders, 
that of Inequiteles, has the external spinnerets almost 
conical, projecting but little, convergent, disposed like a rosette, 
and the feet very slender. Their jaws are inclined on the 
labrum, and grow narrow, or at least do not sensibly widen, 
at their posterior extremity. 
The majority have the first pair of feet, and then the fourth 
the longest. Their abdomen is more voluminous, more soft, 
and more coloured, than in the preceding tribes. They make 
webs with an irregular net-work, composed of threads, which 
cross each other in all directions, and on different planes. 
They bind their prey with cords, watch carefully over the pre- 
servation of their eggs, and do not abandon them until they 
disclose the young. They live but a short time. 
Some have the first pair of feet, and after them the fourth, 
the longest. Such are 
Seytodes, Latr., 
Which have but six eyes, disposed in pairs. According to 
