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 France he published in the Bulletin des Sciences, 

 under the name of Cri/ptostoma, which is indeed a most singular 

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

 very much resembles the Sigaret of Adanson, 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 Cri/ptosioma 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 Lamouiroux 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, Gray. 



