22 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 82 



Genus Type & Synonym 



Cyclostoiiia 



1 2] C. volvulus 



§Lamarck's genotype for this genus in 1799 was 

 Turbo scalai'is, Lin., wliich in his Syst. 88 he 

 transferred to Scalaria, a name which is pre- 

 ceded by Epitonmm, Bolten, 1798. His second 

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

 Lin., which in 1803 he transferred to his genus 

 Delphinula. Draparnaud, 1805, employed the 

 generic name for a miscellaneous assemblage. 

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

 Helix volvulus of Miiller, a Cyclophorid, and 

 this remains the type of Cyclostoiiia, Lamk., 

 of the Histoire. 

 242 106 Plaiiorbis \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 

 planorbis ( Lin.). 



242 106 Pliysa 



243 107 [2] P. fonfinalis (Bulla fontinalis. 



Linn.) 

 §Same in Fl. 1822, p. 574. 



243 107 LyiiiiKra [2] L. stagimlis (Helix sfagnalis. 



Linn.) 

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

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

 Mtf. ii, 263 (with altered generic name of 

 Lynmus) 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 tnelanus. 



