264 Analytical Notices of Books. 



Annales des Sciences Naturelles. By A Society of 

 Naturalists. 



Under this title a periodical work has commenced in Paris, 

 with the current year, and promises to be very useful. It is 

 intended to contain original papers upon all the branches of 

 Natural Science that are usually considered as purely Scientific, 

 with translations and extracts from other works ; but confined 

 principally to the Animal and Vegetable Kingdoms. 



The following original papers connected with Zoology have 

 appeared in the first five numbers, with illustrative plates ; together 

 with several others upon Geological and Botanical subjects. 



A new theory of Generation, embracing the history and de- 

 scription of Spermatic Auimalcula j in a series. By Messrs. 

 Pke'vost and Dumas. 



A Memoir upon a Larva that feeds upon Helix nemoralis^ and 

 the insect produced by it, which is named Cochleoctonus vorax. 

 By the Count Ignatius Mielzinsky. — To this paper Mous. 

 Latreille has added a note. 



Extract of a Letter from M. de Freminville; giving an ac- 

 count of some of his discoveries in Zoology, &c. in a voyage 

 along the Western Coast of Africa. 



Anatomical researches upon the Thorax of articulated Animals, 

 particularly that of hexapode Insects. By Victor Audoin. 

 A series of chapters. 



Some considerations respecting Medusce. By Messrs. Quoy 

 and Gaimard. With descriptions of Cyanea rosea, and C. Astier, 

 two species hitherto unnamed. 



A Note upon a new Genus of the Family of Neritaceoe. By 

 Mons. G. P. Deshayes. The Genus here described is the 

 Pileolus of Sowerby, to which Mons. Deshayes has added a 

 third species, which he has named Pileolus Neritoides; it is yery 

 much like Neritina Altavillensis. 



Description of a new species of Arachnidewy Genus Epeira, 

 Walcknaer. By Mons. C. Vauthieu. 



[Of this and the following two articles, we have given trans- 

 .lations in the present number, at p. 223, 224, and 233.] 



