PULMONARY. 329 



found it in the mountains of Narbonne, in the Pyrennees and among the 

 rocks of Catalonia. To this latter naturalist we are indebted not only for 

 our knowledge of the external characters of this spider, but for many curi- 

 ous observations relative to its habits. " She constructs," says he, " a shell 

 resembling- a calotte an inch in diameter, on the under surface of large 

 stones or in the fissures of rocks. Its contour presents seven or eight 

 emarginations, the angles of which are alone attached to the stone by silken 

 fasciculi, the margin being free. This singular tent is admirably woven. 

 The exterior resembles the very finest taffeta, formed, according to the age 

 of the animal, of a greater or less number of layers. Thus, when the young 

 Uroctea first commences her establishment, she merely forms two webs 

 between which she seeks for shelter. Subsequently, and I believe at each 

 change of tegument, she adds a certain number of layers. Finally, she lines 

 an apartment with a softer and more downy material which is to enclose the 

 sac of eggs and young ones. Although the exterior shell is more or less soiled 

 by foreign bodies which serve to conceal it, the chamber of the industrious 

 architect is always extremely neat and clean. There are four, five, or six 

 egg-pouches or sacculi in each domicil; they are lenticular, more than four 

 lines in diameter, and formed of a snow-white taffeta lined with the softest 

 down. The ova are not produced till the latter end of December or the 

 beginning of January; the young are to be protected from the rigour of 

 winter and the incursions of enemies all is prepared; the receptacle of 

 this precious deposit is separated from the web that adheres to the stone by 

 soft down, and from the external calotte by the various layers I have men- 

 tioned. Some of the emarginations in the edge of the pavilion are com- 

 pletely closed by the continuity of the web, the edges of the remainder are 

 merely laid on each other, so that by raising them up, the animal can issue 

 from its tent or enter it, at pleasure. When the Uroctea leaves herhabi- 

 tation for the chase, she has nothing to fear, she only possesses the secret 

 of the impenetrable emargination, and has the key to those which alone 

 afford -an entrance. When her offspring are able to provide for themselves, 

 they leave their native dwelling, to establish elsewhere their individual 

 habitations, while the mother returns to it and dies it is thus her cradle and 

 her tomb." 



There are several other genera of this section, such as Drassus, Segestria, 

 Clubiona, &c., in the last of which, as well as in the following ones, we find 

 eight eyes. They form two families, the Terrestrial and Aquatic. Som 

 (Clubiona) construct silken tubes under stones; and others ( Aranea proper), 

 a web with a tube, in our houses, along hedges, &c. 



In the second section of the sedentary and rectigrade spiders,that of the 

 iBrnatriTEi.*, the external papillae are nearly conical, project but little, are 

 convergent, and form a rosette; the legs are very slender. The jaws in- 

 cline over the lip, and become narrower at their superior extremity, or at 

 least do not sensibly widen. 



Most of them have the first pair of legs longest, and then the fourth. The 

 2 R 



