ORDER PULMONARLE. 
393 
appearance, and which is regarded as the fecundating organ, 
properly so called; but in the arachnides, with lour pulmon- 
ary sacs, and in some others of the division ol those which 
have but two, the last articulation of the palpi of the same 
individuals presents but a single corneous piece, in the form 
of a hook or ear-pick, without the least distinct aperture. 
Although Muller and some others were wrong, with reference 
to some entomostraca, in placing the male sexual organs on 
two of their antennas, it is not less true that the parts consi- 
dered as analogous in the arane'ides are very different from 
those which have been observed on the antennae of these Crus- 
tacea, and that we cannot conceive what their use can be if 
we refuse them this office. 
According to the experiments of Audebert, who has given 
us a history of the Simiae, worthy of the talents of this great 
painter, it is proved that a single fecundation can suffice for 
many successive generations. But as in all the insects, and 
other analogous classes, the eggs are sterile if the two sexes 
do not unite. The coupling, in our climates, takes place 
from the end of summer, until towards the end of September. 
The eggs, which are first laid, often disclose before the end of 
autumn ; the others pass the winter. It has been remarked 
that the females of some species of lycosee, or wolf-spiders , 
tear the cocoon of the eggs, when the young are about to 
come into the world. When newly born, they climb on the 
back of the mother and remain there for some time. Other 
female arane'ides carry the cocoon under the belly, or watch 
over its preservation, by fixing it near them. The two 
hinder feet are not developed, in some young ones, until a 
few days after their birth. There are some which, at the same 
period, are assembled for some time in society, and appear 
to spin together. Their colours then are often more uniform, 
and the naturalist who has but little experience, might very 
erroneously be induced to multiply the species. One of our 
