Cyclostoma and Pomatias. 177 



1801. /Sca^an'rt, Lamarck {= Cyclostoma, Lamarck, 1799> 

 partim). Scalar ia scalaris {= Cyclostoma scalaris) 

 1799). 



1801. Cyclostoma, Drapavnaud {=■ Cyclostoma, Lamarck, 

 1799, partim). For Nerita eleqa?is and all opercu- 

 lated inland Mollusca (except Valvata). 



1803. Cyclostoma, Lamarck. Used by Lamarck in Dra- 

 parnaud's restricted sense, and similarly by all 

 subsequent writers. 



1803. Delpliinula, Lamarck ( = Cyclostoma, Lamarck, 

 1799, and 1801 ])artim). For Turbo delpJimus, L., 

 =^ Cyclostoma delphinus, Lamk. 



Thus Lamarck in 1801 removed Scalaria out of his com- 

 prehensive genus, and in 1803 he acquiesced in Draparnaud's 

 more restricted use of the name to inland Mollusca, in which 

 tlie animal had " Tentacles oculcs a la base externe, mufle 

 proboscidiforme." In my previous notes {ibid. p. 447) I 

 quoted Deshayes (in Lamarck), who explained the whole 

 matter. I may also refer to Lamarck himself as accepting 

 Draparnaud's restricted genus (' Annales du Museum,' vol. iv. 

 (1804) p. 108), also to Felix de Roissy in De Montfort's 

 * Hist. Nat. gen. et partic. des Mollusques,' vol. v. (1805) 

 pp. 290, 295, and 300, and De Montfort, ' Conchyliologie 

 systematique,' vol. ii. (1810) pp. 131, 287, and 295. These 

 and subsequent authors to the present time have acquiesced 

 in the restricted use of Cyclostoma, with C. elegans as type. 



3. Tliat Draparnaud, 1801, established another genus 

 Cyclostoma. " No notice, however, is made by this author 

 to the preoccupation of the generic name in 1799, and we can 

 only infer that Draparnaud was ignorant of its existence." 



Is it not a most extraordinary misapprehension that Dra- 

 parnaud founded his Cyclostoma in ignorance of Lamarck's 

 Cyclostoma ? Why, Draparnaud was a brother Frenchman 

 and Lamarck's conchological friend. It was in consequence 

 of the recommendation of Lamarck, Cuvier, and Lacep^de 

 that Draparnaud's posthumous work on the IMollusea was 

 published. Authors' names were not written after genera in 

 those days, and therefore Draparnaud wrote ''^ Cyclostoma^'' 

 not ^^ Cyclostoma, Lamarck." 



4. Mr. Newton states that Studer established a genus 

 Pomatias in 1789, and placed two species under it — P. elegans, 

 =^ Nerita elegans, Miill.," with reference, and ^'P. variegatus, 

 a new species ; " and that Hartmann in 1821, "apparently 



A7in. & Mag. X. Hist. Ser. 6. Vol. viii. 12 



