PULMONARI^. 
291 
Dysdera, Lat. 
But six eyes arranged in the figure of a horse-shoe, the opening in 
front ; the chelicerse very stout and projecting ; jaws straight and 
dilated at the insertion of the palpi *. 
Filistata, Lat. 
Eight eyes gx’ouped on a little eminence at the anterior extremity 
of the thorax ; the cheliceree small ; the jaws arcuated on the outer 
side, and surrounding the ligula f. 
We now pass to Araneides with but one pair of pulmonary sacs 
and as many stigmata. They all have palpi formed of five joints, 
inserted into the external side of the jaws near their base, and most 
frequently in a sinus ; a ligula extending between them, either nearly 
square, triangular or semicircular, and six fusi at the anus. The 
last joint of the palpi, in the males, is more or less ovoid, and usually 
encloses, in an excavation, a complicated and varied organ of copu- 
lation : it is rarely — Segestria — exposed. 
With the exception of a few species, which enter into the genus 
Mygale, they compose that of 
Aranea, Lin, x\raneus^ of some authors. 
A first division will comprehend the Aranea: Sedentari^, or seden- 
tary spiders. They make webs, or throw out threads to ensnare 
their prey, and always remain in these traps, or their vicinity, as 
well as near their eggs. Their eyes are approximated anteriorly and 
are sometimes eight in number, of which four or two are in the middle 
and two or three on each side, and sometimes six. 
Some, which, from the circumstance of their always moving for- 
wards, we term the Rectigrada;, weave webs and are stationary ;their 
legs are elevated when at rest ; sometimes the two first and two last 
are the longest, and at others those of the two anterior pairs, or the 
fourth and the third. The general arrangement of the eyes does not 
form the segment of a circle or a crescent. 
They may be divided into three sections : the first, or that of the 
Tubitelse, has cylindrical fusi approximated into a fasciculus directed 
backwards ; the legs are robust, the two first or the two last, and vice 
versa, longest in some, and the whole eight nearly equal in others. 
We Avill commence with two subgenera, which, Avith respect to 
the jaws that describe a circle round the ligula, approach the Filis- 
tatee, and are removed from those that follow. 
Clotho, Walck. — Uroctea, Dufour. 
A singular subgenus. The cheliceree are very small, can separate 
but little — thereby approximating this subgenus to the last — and 
* Dysdera erythrina, Lat. ; Walck., Tab. des Aran., V, 49, 50 ; Dufour, Ann. 
des Sc. Phys. V. Ixxiii, 7 ; Aranea rufipes, Fab. ; Dysdera parrula, Dufour, Ib. 
•f- Filistata hicolor, Lat. ; Walck., Faun. Frang., Arach., VI, 1 — 3, A moder- 
ate size species is founded at Guadaloupe, the male of -which has long and slender 
legs, curved palpi, with the genital organs situated at the extremity of the last joint, 
and terminated by a slender and arcuated, or falciform book, 
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