ORDER PULMONARLE. 
405 
of drassus. The two upper spinnerets, or the most lateral, 
are long; but that which, according to M. Du four, particu- 
larly characterizes his uroctea, or our clotho, is, that in place 
of the two intermediate spinnerets, we find two pectiniform 
valves, opening and closing at the will of the animal. 
As yet but a single species is known, Uroctea , 5 — Maculata , 
Dufour, Annal. des. Scienc. Phys. V. lxxvi. 1 ; Clotho Duran - 
dii , Latr. Its body is five lines in length, of a chestnut-brown, 
with the abdomen black, having five round, yellowish spots 
above, four of which are disposed transversely in pairs, and the 
last or odd one is posterior ; the feet are hairy. We see by the 
plates of the great work on Egypt, that M. deSavigny found it 
in that country, and that he proposed to form with it a new gene- 
ric group. M. le Comte Dejean brought it from Dalmatia, and 
the Chevalier de Schreibers, director of the imperial cabinet of 
Vienna, has sent me some individuals collected in the same 
places. M. Dufour has also found it in the mountains of Nar- 
bonne, in the Pyrenees, and in the rocks of Catalonia. We 
are indebted to him, independently of the knowledge of the 
external characters of this arane'id, for some curious observa- 
tions respecting its habits. 66 It makes,” he tells us, “ at the 
inferior surface of large stones, and in the clefts of rocks, a 
cocoon, in the form of a cap or little dish, a good inch in 
diameter. Its contour presents seven or eight emarginations, 
of which the angles alone are fixed upon the stone, by means 
of bundles of threads, while the edges are free. This singular 
tent is of an admirable texture : the exterior resembles the 
finest taffetas, composed, according to the age of the worker, 
of a greater or less number of doublings. Thus, when the 
uroctea, as yet young, commences to establish its retreat, it 
only fabricates two webs, between which it remains in shelter. 
Subsequently, and, I believe, at each moulting, it adds a cer- 
tain number of doubles. Finally, when the period marked 
for reproduction arrives, it weaves a cell for this very purpose, 
