NOTICE. 



*^* With this Number we send gratis to those who 

 have paid for the preceding Nos., a copy of a work which 

 we have recently printed, entitled "Glossary to the 

 American Conchology," explanatory of the terms made 

 use of in the science of Conchology. A copy will also 

 be presented to each subscriber who shall transmit by 

 mail, free of postage, his respective sum now due, with- 

 in one month after having received this number. We 

 hope at a future day to be able to present our subscribers 

 with an " Introduction to the science of Conchology'* 

 with plates, on the same terms. 



.] 



Add to the synonyms of M. papuana. Lam. — Lister, 

 pi. 1057. 



In the observations on Sigaretus perspectivus in No. 3, 

 I remarked its striking similarity to Cryptostoma leachii, 

 Blainv. On further comparison I find that it cannot be 

 generically separated from that species, and the reader is 

 therefore requested to alter the name to Cryptostoma per- 

 spectiva Nob. Analogy also indicates the change of Siga- 

 retus maculatus, N. to Cryptostoma maculata. We shall 

 in our next number give the generic character of Cryptos- 

 toma, to be substituted for that of Sigaretus, which latter 

 can be retained until we publish a species of that genus. 

 In the 2d editiou of the Kegne Animal, Cuvier in a note 

 to the genus Cryptostoma says, that a species was sent 

 from Carolina by Mr. L'Wermenier. This was doubtless 

 one of the above, perhaps the perspectivus, N. and to 

 which he gives the name of Cr. caroiinum, Cuv., not be- 

 ing aware that I had loug since described it. 



Of Unio glcbulus, N. Mr. Barabino has recently aent me some fine specimena 

 from Bayou Teche, one of which is four inches and three tenths broad and two 

 inches and four fifths long. 



A Venericardia was presented to me sereral years since by my brother, who 

 obtained it on the coast of New-Jereey. I described it under the name of 

 cribraria, but as the specimen is imperfect I did not publish an account of it. 

 It is longitudinally ovate-orbicular, with twenty slightly elevated ribs, more 

 distant from each other than their width, decussated by concentric, aJmost 

 equally elevated lines. Length one inch and about three twentieth?, and 

 breadth one inch and one twentieth. 



Can this be a variety of the borealis of Conrad? Having but a single speci" 

 pen I cannot determine this questioo. 



