428 Scientific Notices. 



one section of his genus Laminaria ; (the other section of which 

 is Pleurobranchus of Cuvier). Blainville, when in England de- 

 scribed one of the Mollusca in the British Museum, which on 

 his return to Fiance he published in the Bulletin des Sciences, 

 under the name of Crypiostoma, which is indeed a most singular 

 animal ; and npon examining the specimen I find that the shell 

 very much resembles the Sigaret of Adanron, and that the animal 

 is altogether different from that described by Cuvier and La- 

 marck. It therefore appears that Lamarck has taken his generic 

 character of Sigaretus from the shell of one animal, and his de- 

 scription of the animal from that of a very different shell : and 

 in his Hist. Nat. des Anim. sans vert., he has described several 

 species agreeing in generic characters with the shell. Two genera 

 are evidently thus confounded ; to avoid this we are placed in a 

 peculiar dilemma, for if we keep Sigaretus for Cuvier's animal, 

 and take Crypiostoma for the Sigaretus of Lamarck, we shall 

 give the name Sigaretus, derived from the Sigaret of Adanson, to 

 a very different shell, and we shall have to alter the names of all 

 Lamarck's species: but in my opinion this would be better than 

 forming a new name, (for Laminaria cannot be used, being al- 

 ready engaged by Lamouroux for a genus of marine plants.) 

 Thus, my Sigaretus and that of Cuvier is the Laminaria of Mon- 

 tagu, Helix perspicua of Linneus, and Bulla haliotoidea of British 

 Authors : and my Cryptostoma and that of Blainville, is the 

 Sigaretus of Lamarck and Sowerby, the Sigaret of Adanson, and 

 the Helix haliotoidea of Linneus. J. E. GiiAY. 



