PULMONARl^. 
301 
We now come to Spiders that are sedentary, like the preceding, 
but which have the faculty of moving sideways, forwards, and back- 
wards, in a word, in all directions. They constitute our section of 
the Laterigrad^. The four anterior legs are always longer than 
the others ; sometimes the second pair surpasses the first, and at 
others, they are nearly equal ; the animal extends them to the whole 
of their length on the plane of position. 
The cheliceree are usually small, and their hook is folded trans- 
versely, as in the four preceding tribes. Their eyes, always eight in 
number, are frequently very unequal, and form a segment of a circle 
or crescent : the two posterior or lateral ones are placed farther back 
than the others, or are nearer to the lateral margin of the thorax. 
The jaws, in most of them, are inclined on the lip. The body is 
usually flattened, resembling a crab ; the body is large, rounded, and 
triangular. 
I'liese Arachnides remain motionless on plants, with their feet 
extended. They make no web, simply throwing out a few solitary 
threads to arrest their prey. Their cocoon is orbicular and flattened. 
I'hey conceal it between leaves, and watch it until the young ones 
are hatched. 
Micrommata, Laf . — Sparassus, Walck, 
Jaws straight, parallel and rounded at the end ; eyes arranged four 
by four, on two transverse lines, the posterior of which is longest, 
and arcuated backwards. The second legs, and then the first, are 
the longest ; the ligula is semicircular *. 
Microm. smaragdula ; Ar. smai'agdula, Fab. ; Ar. viridissima, 
De Geer; Clerck, Aran. Suec. pi. 6, tab. iv. A medium size; 
green ; the sides edged with light yellow ; abdomen greenish 
yellow, intersected on the middle of the back by a green line. 
It ties three or four leaves in a triangular bundle, lines the 
interior with a thick layer of silk, and places its cocoons in the 
middle ; the latter is round, Avhite, and so diaphanous, that the 
ova can be perceived through its parietes. The eggs are not 
agglutinated. 
71/. Argelas ; Dufour, Ann. dcs Sc. Phys., VI, p. 306, XCV, 
I ; Walck., Hist, des Aran., IV, ii. This animal, whose specific 
appellation will remind the French naturalists of one of their 
most zealous sevans, one already recommended by me to their 
esteem as my protector from the horrors of the revolution, is one 
of the largest species indigenous to France; M. Dufour has 
completed my description of it, and has observed its habits. The 
body is about seven or eight lines in length, of a cinei’eous 
flaxen colour, covered Avith doAvn, and more or less spotted Avith 
black. The top of the abdomen, from its middle to the extre- 
mity, is marked Avith a band formed of a series of small hatchet- 
shaped spots, of the last mentioned colour. A black longitudinal 
* M. Walckeiiaer places this genus in that series which is composed both of the 
Vagabunda; and the Sedentarice, such as the Attee or our Saltici, the Thomisi, Philo- 
dromi, Drassi, and Clubion(E, and Avhich have but two hooks to the tarsi. 
