134 Scientific Notices. 



tton of this Society, as an evidence that the love of our favourite 

 science, is becoming every day more and more extended. We 

 are of opinion that such associations, if conducted in a liberal and 

 open manner, are beneficial to Society, and to Science in par- 

 ticular, because we think that the knowledge of the works of 

 the great Creator is yet in its infancy among men, how consider- 

 able soever the progress already made in such knowledge may be. 

 Nearly contemporaneous with " The Linnean Society of Cal- 

 vados,''^ is " The Zoological Club of the Linnean Society 

 OF London," of which we have already taken notice in a former 

 page. As well wishers to the extension of the delightful study 

 in which we are engaged, we congratulate the students in 

 Natural Science upon their formation, and sincerely hope that 

 their success may be commensurate with the talent and wishes 

 of the Founders. 



ETiiERiA. — Lam. 



With reference to the first number of Sowerby's Genera of 

 Recent and Fossil Shells, where he has given his reasons for 

 supposing that the Kthcria might prove to be a fresh-water shell, 

 we have to state that M. Cailliaud has discovered this shell in 

 considerable abundance in the Nile, in the kingdom of Senaar, 

 thus verifying Mr. G. B. Sowerby's conjectures. It appears 

 also that, from an examination of specimens brought from thence 

 by M. Cailliaud, M. Dc Ferussac has ascertained that what are 

 described by M. de Lamarck as four distinct species, should 

 rightly be considered only as two species and their variations. 

 The principal distinguishing character between Etheria and 

 Ostrea, consists in the two lateral muscular impressions of the 

 former. 



ACCENTOR ALPINUS. 



A female of this bird has been shot lately in the garden of 

 King's College, Cambridge j it is now preserved in the Rev. Dr. 

 Thackeray's collection of British birds. 



