PliANORBIS 83 



1897. PlanorUs[{Diplodiscus) vortex, Lin. : Westerlund, Acta 

 Soc. Fauna & Flora Fenn., xiii, no. 7, p. 115. 



1909. Wuestia vortex (Linnc) : Honigmann, Zcitschr. f. 

 Nalurw., Ixxxi, p. 296. 



First recorded as British probably in 1674, by M Lister 



(Fkil. Trans., ix, p. 99, pi. ii, f. 25). 

 British Distribution in Time : Pleistocene to Recent. 



11. Planorbis (Spiralina) vorticulus, Troschel. 

 Etyni. : — Lat. diuiin. of vortex, a whirlpool. 



1805. Planorbis vortex, Linn. : Draparnaud, Hist. Moll. 

 France, -p. U, 1)1 n, L i & 5. [Non'Uime.] 



1834. Planorbis vorticulus : Troschel, De Limnwaceis, p. 51. 



1835. Planorbis leucostoma, Mich. : Rossmassler Icon i 



p. 105, f. 62. [Nan Michaud.] ' "' ' 



1838. Planorbis vortex, d. vorliculvs, Tiosch.'^ • Beck Index 

 Moll, p. 122. 

 ?1854. Planorbis fragilis. Millet : Millet, Ann. Soc. Linn. 



Maine-et-Loire, i, p. 291. 

 ?1856. Planorbis acics, m. : A. Schmidt, Zeitschr. Gesammt. 

 Naturw. Berlin, viii, p. 154. 



1875. Phaiorbis (Tropidiscus) vorticulus, Troschel : Wester- 

 lund, Malak. Blatt., xxii, p. 106. 



1877. Planorbis [Gyrorbis) vorticulus, Troschel : Clessin, 

 Dcutsch. Excur. Moll. Fauna, p. 405, f. 257! 



1897. Planorbis (Diplodiscus) vorticulus, Trosch. : Wester- 

 lund, Acta Soc. Fauna & Flora Fenn., xiii 

 no. 7, p. 116. 



1909. Wuestia vorticulus (Trochel) : Honigmann, Zeitschr. f. 

 Naturw., Ixxxi, p. 296. 



First recorded as British in 1905 by A. S. Kcnnard & 

 B. B. Woodward {Proc. Malac. Soc. Land., vi, p. 356). 

 British Distribution in Time : Cromeriau to Recent. 



12. Planorbis (spiralina) spirorbis (Linne). 

 Etym. : — Lat. spira, a coil + orbis, a circle. 



1758. Helix spirorbis: Linn/EUS, Syst. Nat., ed. 10 p 770 



no. 588. 

 1767. Helix spirorbis: Linnaeus, o. c, ed. 12, p. 1244, no. 672. 

 1767. Planorbis spirorbis, Linn. : Geoffroy, Traite Con. jpari^' 



p. 88. 

 1774. Planorbis spirorbis : Muller, Verm. Hist., ii, p. 161. 

 1791. Helix spirorbis: Gmelin, in Linn. Syst. Nat., ed. 13, i 



pt. 6, p. 3624, no. 36. 

 1803. Helix spirorbis, Gmcl. : Montagu, Test. Brit., p. 455, 



pi. XXV, f. 2. 



