22 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 82 



Q.J.s. 



1823, July Reprint 



Page Page Genus Type & Synonym 



241 105 Cyclostonm 



242 106 [-] C- volvulus 



§Lamarck's genotype for this genus in 1799 was 

 Turbo scalaris, Lin., wliich in his Syst. 88 he 

 transferred to Scalaria, a name which is pre- 

 ceded by Epltonhim, Bolten, 1798. His second 

 type in 1801, Syst. 87, was Turbo dclphiniis, 

 Lin., which in 1803 he transferred to his genus 

 Delpliinida. Draparnaud, 1805, employed the 

 generic name for a miscellaneous assemblage. 

 Montfort in 1810 (ii, 291) chose as type the 

 Helix volvulus of Mijller, a Cyclophorid, and 

 this remains the type of Cyclostonm, Lamk., 

 of the Histoire. 

 242 106 Plauorbis [2] P. corncus {Helix cornea. 



Linn.) 



§Lk. Prod. 76 and Syst. 94 cite the Helix cornu- 

 arietis of Linne. Montfort, ii, 271, chose 

 Helix cornea, Lin., and has been followed by 

 most authors, but when Geoffroy founded the 

 genus he included the Helix planorbis of 

 Linne and so did Miiller who followed him. 

 The type by tautonomy is, therefore, Planorbis 

 plauorbis (Lin.). 



242 106 Pliysa 



243 107 \2] P. fontinalis {Bulla fontinalis. 



Linn.) 

 §Same in Fl. 1822, p. 574. 



243 107 Lyinncra [2] L. stagualis {Helix stagnalis. 



Linn.) 

 §Genotype, Lk. Prod. 75, is Helix stagnalis, 

 Lin. The same is cited in Lk. Syst. 91 and 

 Mtf. ii, 263 (with altered generic name of 

 Lyiunus) and by Fl. 1818, 312. 



244 108 Melania [2] M. truncata. 



§Genotype in Lk. Prod. 75 is Helix amarula, 

 Lin., which is again cited in Syst. 91. Mtf. ii, 

 323, has the same under the changed name of 

 Melas melanus. 



