ORDER PULMONARI^. 403 



and advanced, and whose jaws are straight, and dilated at the 

 insertion of the palpi. 



FiLiSTATA, Lair., 



Which have eight eyes grouped on a little elevation at the an- 

 terior extremity of the thorax, the forceps small, and the jaws 

 arched at the external side, and surrounding the tongue as a 

 centre. 



We now pass to the araneides which have but a single pair 

 of pulmonary sacs and stigmata. All present palpi with five 

 articulations, inserted on the external side of the jaws, near 

 their base, and most frequently in a sinus ; a tongue advanced 

 between them, either almost square, or triangular, or semi- 

 circular; and six nipples or spinnerets at the anus. The last 

 articulation of the palpi of the males is more or less ovoid, and 

 encloses, most frequently, in an excavation, a complicated and 

 very varied copulatory organ. Earely {Segestria) it is un- 

 covered. 



With the exception of a small number of .species, entering 

 into the genus mygale, they compose that of 



The Spider, Aranea of LimifBus, or Araneus of some 



writers. 



A first division will comprehend the Sedentary Spi- 

 ders. They make webs, or at least send forth threads, to 

 surprise their prey, and remain habitually within those snares, 

 or close beside them, as well as near their eggs. Their eyes 

 are approximated on the breadth of the forehead, sometimes 

 to the number of eight, four or two of which are at the middle, 

 and two or three on each side ; sometimes their number is six. 



Some, which in walking always proceed straight forward, 

 and which we name on that account Rectigrades, weave 

 webs, and are always stationary. Their feet are elevated in 



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