92 ANCYLIDyE 



Fara. : ANCYLID/E.i 



Genus : 1. ANCYLUS, GeofEroy. 



Etym. : — " Grec 'AyK-uAog, qui signifie convexe." 

 Monotype : — Patella Jacustris, Linne. 

 {Patella, vett. auctt.) 



1767. Ancylus : Geoffeoy, Traite Coq. Paris, pp. 13 & 122. 

 1817. Ancyclus [err. typ. ?] : Jurine, Helvet, Alman, p. 34. 

 1819. Ancyclus, Geoff, [err. typ.] : Say, Nicholson's Brit. Ency., 



3rd Amer. ed., " Conchology " [p. 8]. 

 1837. Acroloxus, subg. 2 of Ancylus : Beck, Index Moll., p. 124. 

 1840. Vellefia : Gray in Tiirton's Manual, new ed., p. 250. 

 1846. Ancyllus [err. typ.?] [pars] : Graells, Cat. Moll. Espana, 



p. 22. 

 1853. Acroxus : Bourguignat, Journ. de Conchyl., iv, p. 169. 



[He misderived Beck's Acroloxus from dh-pos 



+ o^vs.] 

 1855. Acroloxus, Beck [as a genus] : H. & A. Adams, Genera 



Moll, ii, p. 266. 



1. Ancylus lacustris (Linne). 



Etym. : — Lat. lacus, a lake. 



1758. Patella lacustris : Linn.-eus, Syst. Nat., ed. 10, p. 783, 



no. 672. 

 1767. Patella lacustris : Linn^us, o. c, ed. 12, p. 1260, no. 769. 

 1767. Ancylus lacustris, Linn. : Geoffroy, Traite Coq. Paris, 



p. 124. 

 1774. Ancylus lacustris : Muller, Verm. Hist., ii, p. 199. 

 1786. Patella ohlonga : Lightfoot, Phil. Trans. Roy. Soe., Lxxvi, 



p. 168, pi. iii [b], f. 1-5. 

 1791. Patella lacustris : Gmelin, Linn. Syst. Nat., ed. 13, i, 



pt. 6, p. 3710. 

 1799. Patella oblonya : Pulteney, Caf. Dorset., p. 51. 

 1801. Ancylus lacustris : Draparnaud, TaU. Moll. France, 



p. 47. 

 1803. Patella lacustris, Lin. : Montagu, Test. Brit., p. 484. 

 1805. Aneylus lacustris, Linn. : Draparnaud, Hist. Moll. 



France, p. 47, pi. ii, f. 25-27. 

 1807. Patella oblonga, Lightfoot : Maton & Rackett, Trans. 



Linn. Soc, viii, p. 233. 

 1813. Patella oblonga : Rackett, in Pulteney, Cat. Dorset., 



ed. 2, p. 58, pi. xviii, f. 20*; xxii, f. 8a. 

 1813? Patella (Crepidula) oblonga: Fleming, Edinh. Ency., 



vii, p. 65. 



' For Notes concerning the genera of the British species and their types, 

 See KenN/Uid & Woodward, Proc. Malac. Soc. Lond., xiv, 1920, p. 86 

 also Nautilus, xxxviii, 1925, p. 83. 



