14 PALUDESTRINID^ 



1880. Paludina gibha, Sandb. : Sandberger, Palaeontogr. 



xxvii (N.F. vii), p. 97, pi. xii, f. 2, 2 a. 

 1914. Vivipara gibha (Sandberger) : Kennard & Woodward, 



List Brit. Non-mar. Moll., p. 11. 



First recorded as British in 1872, by S. V. Wood, as 



Paludina contecta, Millet. {See rcf. above.) 

 British Distribution in Time : Cromerian. 



5. fViviparus glacialis (S. V. Wood). 



Etym. : — Lat. glacialis, icy (because found in beds attributed 

 to the Glacial Period). 



1872. Paludina ? glacialis, S. Wood : S. V. Wood, Crag Moll. 

 {Pal. Sac. Monog.), 1st Suppt., p. 68, pi. iv, 

 f. 14, pi. vii, f. 25. 



1899. Vivipara glacialis (S. V. Wood) : Kennard & Wood- 

 ward, Proc. Malac. Soc. Land., iii, p. 199. 



First described as British in 1872, by S. V. Wood, as 



Paludinal. {See ref. above.) 

 British Distribution in Time : Pliocene and Cromerian. 



Fam. : PALUDESTRINID^E. 

 (Sub-fam. : Bythinin.e.) 



Genus : 1. BITHYNIA, Leach. 



Etym. : — Named after Bithynia. a province in Asia Minor. 



Type : — Helix tentaculata, Linnaeus. 



{Helix, Nerita, Turbo, Cyclostoma, Paludina, vett. auctt.) 



1818. Bithynia : Leach, in Abel's Narrative of a Journey in 



. . . China, p. 362. 

 1821. Bithinia, subg. of Paludina : Gray, Lond. Med. Repos., 



XV, p. 239. 

 1850. Bijthinia, Gray : Stein, Lehend. Schneck, <£• Musch. 



Berlins, p. 92. 

 1856. Elona, subg. of Bythinia : Moquin-Tandon, Hist. Moll. 



France, ii, p. 527. 

 1870. Bytinia : Millet, Faune Invert. Maine-ct-Loire, i, p. 56. 

 1870. Grayana, subg. of Bithinia : Betta, Atti Accad. Agric. 



Verona, xlvii, mem. p. 113. 



1. Bithynia tentaculata (Linnaeus). 



Etym. : — Low Lat. tentaculum, a feeler. 



1758. Helix tentaculata : Linnaeus, Syst. Nat., cd. 10, p. 774, 



no. 616. 

 1767. Helix tentacxdata : Linn.eus, o. c, cd. 12, p. 1249, no. 707. 



