GOOTODISCUS 153 



18G4. Punctum minulissimum, Lea : Morse, J own. PorlJand 

 Soc. Nat. Hist., i, pp. 5 & 27, figs. & pi. 

 viii, f. 71. 



1871. Patula pyc/mern, Drap. : Kobelt, Cat. Binnenconch., p. 7. 



187G. Patula {Patularia) pygtjuca, Draparnaud : Clessin, 

 Deutsch. Excur. Moll. Fauna, p. 90, f. 41. 



1878. Hyalinia (Polita) ininutissinia, Lea : Clessin, Nomencl. 



Helic. vivent., p. 64. 



1879. Patula (Patulastm) fygmcea, Drap. : Clessin, o. c, p. 87. 

 1881. Patula (Patulastra) pygmcea, Drap. : Kobelt, Cat. 



Binnenconch., ed. 2, p. 17. 

 1885. Microphysa pygmaea, Drap. : W. G. Binney, Bull. U.S. 



Nat. Mus., xxviii, p. 71, fig. 31. 

 1889. Helix (Puncluni) pygmcea, Drp. : Westerlund, Fauna 



Paldarct. Region, ii, p. 8. 



1893. Punctum pygmreum, Drap. : Pilsbry, in Tryon's Manual 



Conch., Ser. II, vol. ix, p. 8. 



1894. Patula {Punctum) pygmcea, Drap. : Weiss, Nachrbl. 



Deutsch. Malak. Gesell., xxvi, p. 151. 

 1909. Punctum pygmceum (Draparnaud) : Taylor, Monog. 

 Moll. Brit. Is. [iii], p. 157, pi. xix. 



First recorded as British in 1821, by J. E. Gray, as " Helix 



Zonites pycjmcea.^'' {See ref. above.) 

 British Distribution in Time : Cromerian to Recent. 



Genus : 2. GONIODISCUS, Fitzinger (em.). 



Etym. : Gr. yiuvui + ^i(rKo<;, an angle-edged disc. 



Type : — Helix perspectiva, Megerle von Miihlfeld, 1818 [non Say, 



1817] = solaria, Menke. 

 (Helix, Pyramichila, Patula, vett. auctt.) 



1833. Gonyodiscus [sic] : Fitzinger, Beifr. Landesh. Oesferr., 



iii, p. 98. 

 1833. Discus [pars] : Fitzinger, t. c, p. 99. 

 1837. Dclomphalus, Ag., subg. 8 of Helix [pars] : Charpentier, 



Netie Denkschr. Ally. Schweiz. Gesell., i 



[no. 2], p. 12. 

 1837. Eyryomphala, subg. 4 of Helix [pars] : Beck. Index Moll., 



p. 8. 

 1837. Patula [pars] : Held, I.<;is, xx, hft. 12, col. 916. 

 1847. Euryomphala, subg. of Helix [pars] : Beck, Amtl. Ber. 



24. Versamm. Deutsch. Naturf., p. 122. 

 1855. Euromphala [sic]. Beck, § 15 of Helix: Lowe, Proc. 



Zool. Soc. Lond., xxii, 1854 (1855), p. 17G. 

 1876. Patularia, I. Gruppe of Patula [pars] : Clessin, Deutsch. 



E.rcur. Moll. Fauna, p. 86. 



