256 Analj/tical Notices of Boohs. 



system, a desideratum only to be attained by a philosophical 

 investigation of the organs in general. 



Among the numerous researches into the Anatomy of this group 

 of animals, which more enlightened views have determined to be 

 essential to a correct knowledge of their distribution, it appears 

 extraordinary that no dissection had been given of the Cah/ptrma 

 sinensis^ which inhabits the coasts of the very countries whose 

 scientific naturalists were most deeply engaged in this pursuit. 

 Such an inquiry seems indeed to have been especially called for 

 since the period at which the genus was adopted by Lamarck as 

 the type of a family, an eminence which it was reserved for M. 

 Deshayes to prove its title to in his *' Memoir on Calypti^oea.'*'' In 

 this, after a sketch of the history of the species above referred to, 

 he proceeds to furnish a detailed account of its anatomy, illus- 

 trated by figures, which very nearly corresponds with that given by 

 M. Cuvier of the neighbouring genus Crepidula^ and sufficiently 

 evinces the accuracy of its location, though previously founded 

 on the characters of the shell alone. 



Indebted as we are to the author of the preceding article for 

 the information contained in it, we are sorry to have again to re- 

 fer to him on the subject of his controversy with the Baron de 

 Ferussac', who has observed that the Neritce and Naticce are 

 referable to different families. This statemenbwas controverted 

 by M. Deshayes, who declared that, on actual examination of 

 several species of Naiica, he had seen that their eyes were placed 

 on pedicles at the base of the tentacula, as in the animals of the 

 genus Nerita. '' If this be the case," observes M. de Ferussac, 

 in his " Notice" on the subject,, it proves that M. Deshayes has 

 examined Neritce alone," since Cuvier and Adanson both declare 

 that the Naticce have only two tentacula, at the base of which the 

 eyes are situated. 



Of the " Monograph of the genus Eucnemis, by the Baron de 

 Mannerheim," and the " Extract from a letter to M. Henning on 

 Physodactylus, by M. J. Fischer de Waldenheim," it is only 

 necessary to mention the titles, as we purpose to give those articles 

 in a future number. The only other entomological article is a 

 ^' Report on Dalmau's Analecta Entomologica, by M. Latreille," 



