i32 PROCEEDINGS OF THE 



of the legs, and also that of the joints of their antenngc, varies ; 

 it is now ascertained that the number of their eyes varies also. 

 One individual, having but seven pair of legs, possessed but 

 two eyes on each side of its head ; now it is well known that 

 in th6 adult LitJiohlus the eyes are numerous, grouped together, 

 and easy to distinguish. M. Gervais referred to M. Savigny's 

 work on Egypt, in which a Lithohius was figured, which had 

 but four eyes on each side of its head, like the true Scolopendrce ; 

 he thought that M. Savigny must have possessed an individual 

 whose eyes were not yet perfectly developed, but which still 

 was further advanced towards maturity than an individual 

 with two eyes only; and he was confirmed in this opinion by 

 the fact, that the Lithohius figured by M. Savigny had but 

 twenty joints to its antennro, whilst other known species had 

 more than thirty joints when arrived at the perfect state. 



The following papers were read : — 



A Memoir on the Stridulation of Insects, by M. Goureau. 



Observations on the Causes of the Appearance of Cehrio, by 

 M. Graells. 



M, le Comte de Perrochel, of the Chateau de Saint Aubin, 

 M. Leprieur, jun. of Dieuze, and M. Lequien, of Paris, were 

 admitted members of the Society. 



Sitting of the 1st of February, 1837. 



M. AuDouiN in the Chair. 



A letter from M. Guerin was read, containing his resigna- 

 tion of membership in the Society ; on the subject of this 

 letter it was determined, that it should be re-read at the follow- 

 ing sitting, and that the members should be apprised of it 

 before deliberating on its contents. 



M. Gervais, in addition to his observations at the last 

 sitting on the metamorphosis of the Myriapoda, reported that 

 he had since had an opportunity of examining the young of 

 GeopJiilus. A young individual of this species which he had 

 procured at Paris, and which was but a line in length, pos- 

 sessed but six pair of legs ; the joints of the antenuEe were 

 already fourteen in number, and the last segment of the body 

 possessed the two setas which are characteristic of the genus. 

 M. Gervais is preparing a figure and description of this little 

 animal. 



