BELGRANDIA AND BYTHINELLA 23 



1869. BeJfjrandia : Bourguignat, Cat. Moll, envir. Paris, p. 14. 

 1878. Thermhydrohia : Paulucci, Mat. Faune Malac. Ital, 



p. 48. [The sole species cited is " T. ihenn- 

 alis (Turbo) Linne " ; but Dolifus [Journ. de 

 Conchyl, lix, 1912, p. 215) selects as type 

 Paludina marginata, Michaud.] 



1. fBelgrandia marginata (Michaud). 

 Etyrn. : — Lat. manjinalux, bordered. 



1831. Paludina marginata : Michaud, Compl. Hist. Moll. 



France Drap., p. 98, pi. xv, f. 58 & 59. 

 1839. Paludina minuta (Strickland) : Murchison, Silurian 



System, p. 555. [Norn, nud.] 

 1856. Bythinia {BythincUa) marginata, Mich. : Moquin-Tan- 



DON, Hist. Moll. France, ii, p. 518, pi. xxxviii, 



f. 29-32. 

 1858. Paludina minuta, Strickl. : Jardine's Memoirs of H. E. 



Strickland, pp. 96 & 97. 



1870. Belgrandia marginata : Paladilhe, Ann. Malac, i, 



p. 232. 



1880. Belgrandia nana, Sandb. : Sandberger, Palaeonlogr., 



xxvii (N.F. vii), p. 99, pi. xii, f. 5-5 b. 



1881. Hydiobia {BythineUa) marginata, Mich. : Kobelt, Cat. 



Euro]}. Binnenconch., ed. 2, p. 141. 

 1886. Paludinella (Belgrandia) marginata, Mich. : Wester- 



LUND, Fauna Palaarct. Region, vi, p. 47. 

 1912. Thermhydrobia marginata, Michaud : Dollfus, Journ. 



de Conchyl., lix, p. 215. 



First recorded as British in 1839, by Murchisou. (See 



ref. above.) 

 British Distribution in Time : Pleistocene. 



Genus : 5. BYTHINELLA, Moquin-Tandon. 



Etym. : — Dimin. of Bythinia [i.e. Bithynia] a genus of mollusks. 



Type : — Cyclostoma viride (Poiret) Draparnaud. [Dollfus selected 

 the Bulimus viridis of Poiret, but the identity of this is 

 uncertain. Draparnaud's interpretation is here accepted.] 



(Bulimus, Cyclostoma, Turbo, Paludina, Bithynia, Hydrobia, vett. 

 auctt.) 



1826. Leachia [pars] : Risso, Hist. Nat. Europ. merid., iv, 

 p. 102. [Non Lesueur, 1821 (Cephal.).] 



1856. BythineUa, subg. of Bythinia : Moquin-Tandox, Hist. 

 Moll. France, ii, p. 516. [The reference 

 usually given is to Journ. de Conchyl., ii, 

 1851, p. 239 note; but the name appears 

 there only in the vernacular.] 



