I'LANOIIBIS 77 



?1903. IHanurbis Arnuuldi, Clcnnaiii : Ceiimain, Bull. Sac. Sci. 

 Nat. Quest France, Ser. II, torn, iii, p. 191, 

 pi. A, f. 13-15. 

 1913. Plaiiorhis {Gyraulus) Dra-parnaudi, Jeffreys [emend.]: 

 Germain, Moll. France, ii, p. 257. 



[Germain {Moll. France, ii, p. 258) gives as synonyms : — 

 Planorbis pyrenaicits, Bourg. ; and P. tricaasinus, 

 Bourg.] 



First recorded as British about 1702-11, by J. Petiver 

 {GazopJi., pi. xcii, f. 7). 



British Distribution in Time : Cromerian to Recent. 



5. Planorbis (Gyraulus) laevis, Alder. 

 Etym. : — Lat. Icvis, smooth. 



?1801. Planorbis spirorbis (Linn.) : Draparnaud, Tabl. Moll. 



France, p. 44. [Non. Linne.] 

 U826. Planorbis spirorbis. Mull. : Risso, Hist. Nat. Europ. 



merid., iv, p. 97. [Caziot says Risso's shells 



are poor specimens and might be P. spirorbis, 



or P. albus.] 



1838. Planorbis Imvis : Alder, Trans. Nat. Hist. Soc. 



Northumbcrld., ii, p. 337. 



1839. Planorbis lateralis (Strickland) : Murchison, Silurian 



System, p. 555. [Nom nud.] 

 1840,'^ Planorbis Iccvis, Alder : Gray, in Turton's Mammal, new 

 Apr. / ed. p. 261, pi. xii, f. 148. 



q , [ Planorbis Iccvis, Alder : Brown, Illust. Conch. Brit., 

 j^PqI ed. 2, p. 31, pi. xiii, f. 7-9. 



?1841. (Planorbis) Gyraulus regular is : Hartmann, Erd- & 



Sussw.-Gasterop., p. 97, pi. xxviii. 

 1845. Planorbis la;vis, Alder : Brown, Illust. L. & F.-W. 



Conch. Brit., p. 18, pi. iii, f. 37 & 38. 

 ?1848. Planorbis Moquini : Requien, Cat. Coq. Corse, p. 50. 



[Fide Moquin-Tandon.] 

 1852. Planorbis glaber, Jeffreys : Forbes & Hanley, Brit. 



Moll, iv, p. 150, pi. cxxvi, f. 8 & 9 as 



P. laivis. [Non Jeffreys, 1830.] 

 1855. Planorbis [Nautilina) r/laber, Jeff. : H. & A. Adams, 



Genera Moll., ii, p. 264. 

 1850. Planorbis {Gyraulus) la:vis, Alder : Moquin-Tandon, 



Hist. Moll. France, ii, p. 442, pi. xxxi, 



f. 20-23. 



1857. Planorbis {Gyraulus) glaber, Jeffreys : Gray, in Turton's 



Manual, new ed., p. 235, pi. xii, f. 148. 



1858. Planorbis lateralis, Strickl. : Jardine's Memoirs of 



H. E. Strickland, pp. 96 & 98. 



