90 PLANORBID^ 



1831. Hemithalamiis : Leach, in Turton's Manual, p. 116, in 



synon. 

 1840. Segmentaria, sub-gen. of Planorbis : Swainson, Treat. 



Malac, p. 337. 

 1855. Trochorhis : Benson, Journ. Asial. Soc. Bengal., xxiv, 



p. 126. 



1. Segmentina nitida (Miiller). 

 Etym. : — Lat. nitidus, shining. 



1774, Planorbis nitidus : Muller, Verm. Hist., ii, p. 163, 

 1786. Nautilus lacustris : Lightfoot, Phil. Trans. Boy. Soc, 



Ixxvi, p. 163, pi. i, f. 1-7. 

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



pt. 6, p. 3624. 

 1801. Planorbis nitidus [pars]: Draparnaud, Tabl. Moll. 



France, p. 45. 

 1803. Nautilus lacustris : Montagu, Test. Brit., p. 191, pi. vi, 

 f. 3. 

 [Montagu states (p. 195) that Solander returned this 

 shell to Boys under the name of Nautilus Segmentinus. 

 He further says this species occurred in the Portland 

 Collection under the name of Nautilus Ypsilon 

 {Test. Brit., Suppt., p. 88).] 

 1805. Planorbis nitidus. Mull. : Draparnaud, Hist. Moll. 



France, p. 46, pi. ii, f. 17-19. 

 1807. Nautilus lacustris, Lightfoot : Maton & Rackett, Trans. 

 Linn. Soc, viii, p. 114. 



1817. Nautilus lacustris, Lightfoot : Dillwyn, Cat. Shells, 



i, p. 339. 



1818. Segmentina lacustris, Lightfoot : Fleming, Suppt. 4-6th 



ed. Ency. Brit., iii, " Conchology," p. 309. 



1819. Hetnithalamus [nitidus] : Leach, Moll. Brit. Synop. 



(proofs), p. 137. 



1820. Planorbis clausulatus : Ferussac, Journ. Phys., xc, 



p. 301. 



1821. Planorbis nitidus, Miill. : C. Pfeiffer, Naturg. Deutsch. 



Moll, i, p. 82, pi. iv, f. 12 & 13. 

 1823. Helix fontanus : [Brown], Ency. Brit., ed. 6, vi, p. 457, 



1827, Planorbis fontanus. Brown's MSS. : Brown, Illust. 



Conch. Brit., ed. 1, pi. xli, f. 48 & 49. 



1828. Segmentina lineata, Walk. : Fleming, Hist. Brit. Anim., 



p. 279. 

 1830. Segmentina nitida : Fleming, Edinb. Ency., xii. [A 



reference invented by Gray.] 

 1830.) Planorbis Nautileus, Fer. : Kickx, Synop. Moll. Brabant, 

 July, j p. 66. [Non Ferussac] 



1830. Planorbis lineatus, Walker ; Jeffreys, Trans. Linn. 



Soc, xvi, p. 389. 



