OKDER PULMONARIiE. 393 



appearance, and which is regarded as the fecundating organ, 

 properly so called; but in the arachnides, with four pulmon- 

 ary sacs, and in some others of the division of 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 Mliller and some others were wrong, with reference 

 to some entomostraca, in placing the male sexual organs on 

 two of their antennae, it is not less true that the parts consi- 

 dered as analogous in the araneides are very different from 

 those which have been observed on the antenuee 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 lycosae, or icolf-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 araneides 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 



