FAMILY LYMNvEIDvE 8 1 



Orbis SCHROTER, Journ. Steinr. u. Konch., in, p. 10, 1776, an error of cita- 

 tion for Planorbis Argenville. 

 Vortex Anonymous in Mus. Calonn., p. 58, 1797, Helix cornea Linne. Not 



Vortex Oken, 1815. 

 < Anisus STUDER, Syst. Verz., p. 23, 1820 (= Planorbis -f- Pkysd). 



> Anistts FITZIXGER, Verz., p. in, 1833; not of Dujardin, 1821. 

 f Cornu SCHUMACHER, Essai, p. 255, 1817, not of Born, 1778. 



> Spiralina HARTMAXN, Syst Uebers., tab. 1840. (Nude name.) No type 



cited. 



Planorbarius DUMERIL, Zool. Anal., p. 164, 1806. 

 Coretus GRAY (not Adanson), P. Z. S., 1847, p. 180, P. corneus I MRS. 



GRAY, Figs. Moll. An., iv, p. 119, 1850. MOQUIN TAXDOX, Moll. Terr. 



et Fluv., n, p. 423, 1855. GRAY'S Turton's Man., ed. n, p. 233, 



1857. 

 Spirodiscus STEIN, Schn. u. Muscheln Berlins, p. 73, 1850. MORCH, Vidensk. 



Meddels. Kjobn., 1864, p. 309. WESTERLUXD, Acta Soc. Fauna Fen- 



nica, xin, No. 7, p. 112, 1897 ; Acta Acad. Sci. Slav. Merid. , Zagrabiae, 



CLI, p. 1 20, 1902 ; S. corneus (Linne). 

 Tropidiscus WESTERLUND, Fauna Pal. Reg., v, p. 65, 1885, not of Stein; 



Acta. Acad. Sci. Slav. Merid., Zagrabiae, CLI, p. 120, 1902 ; Helix plan- 



orbis Linne. 

 f Caillaudia BOURGUIGXAT, Hist. Mai. de 1'Abyssinie, p. 128, 1883; ist sp. 



C. angulata Bourg., pi. vm, figs. 49-52, op. cit. WESTERLUXD, Acta 



Acad. Sci. Slav. Merid., Zagrabiae, CLI, p. 139, 1902 (a deformed or 



monstrous form of Planorbis). 



Subgenus Planorbis s.s. 



Type Planorbis corneus Miiller. 



(Synonymy of the group given under the generic name.) 



Section PLAXORBIXA Haldeman. 



Planorbina HALDEMAX, Mon. Limn., Physadce, p. 14, 1842, no type cited. 

 Menetus FISCHER, Man., p. 509, 1883; P. guadeloupensis Sowerby ; not 



Menetus Adams, 1855. 

 Anisus GRAY, P. Z. S., 1847, p. 181 ; P. oli-vaceus Spix ; not Anisus Studer, 



1820. 



Subgenus Helisoma Swainson. 



Helisoma SWAIXSON, Malac., p. 337, 1840 ; P. bicarinatus Sowerby. 

 Taphius H. and A. ADAMS, Gen. Rec. Moll., n, p. 262, 1855 ; P. andecolus 



Orbigny. 

 f Anisopsis SAXDBERGER, Land u. Siissw. Conch, d. Vorwelt, p. 958, 1875 ; p - 



loryiCoq., and P. calculus Sandb., Jurassic. 



Section PIEROSOMA Dall, nov. 

 Helisoma (sp.) Auct, not of Swainson ; P. trivolvis Say. 



Section PLAXORBELLA Haldeman. 



Planorbella HALDEMAX, Mon. Limn., Physada, p. 14, 1842 ; P. campanulatus 

 Say. 



