SEGMENTINA 91 



1831. Segmentina nitida, Drap. : Turton, Manual, p. 116, 



f. 99. 

 1831. Hemithalamus [nitid^is^ : Leach, in Turton's Manual, 



p. 116, in synon. 

 1837. Planorbis (Hippeutis) nit'idus, Drap. : Charpentier, 



Neue Denkschr. Allg. Schweiz. Gesell., i [no. 2], 



p. 22. 

 1840,\ Segmentina lineata, Walker : Gray, in Turton's Manual, 

 Apr. / new ed., p. 271, pi. viii, f. 99. 



1840,\ Planorhis (Secjmentaria) lacustris, Flem. : Swainson, 

 May. j Treat. Malac, p. 338. 



Post 1 Segmentina lineata, Fleming : Brown, Illust. Conch. 

 Sept. \ Brit., ed. 2, p. 33, pi. xiv, f. 48 & 49 [in text 



1840.) 50&51]. 



1845. Segmentina lineata, Fleming : Brown, Illust. L. & F.-W. 



Conch. Brit., p. 25, pi. iv, f. 3 & 4. 

 1850. Planorhis (Segmentina) nitidus, Miill. : Stein, Lebend. 



Schneck. & Musch. Berlins, p. 78. 

 1852, \ Hemithalamus [nitidus] : Leach, Moll. Brit. Synop., 

 Feb. j p. 99. 



1852,\ Planorbis lacustris, Lightfoot : Forbes & Hanley, Brit. 

 Apr. ) Moll, iv, p. 162, pi. cxxviii, f. 1-3. 



1855. Trochorbis trochoides, Bens. : Benson, Journ. Asiat, Soc. 



Bengal, xxiv, p. 126. 



1856. Planorbis {Seffmentina) nitidus, Miill. : Moquin-Tandon, 



Hist. Moll. France, ii, p. 424, pi. xxx, f. 5-9. 



1857. Segmentina nitida, Miiller : Gray, in Turton's Manual, 



new ed., p. 246, pi. viii, f. 99. 



1862. Planorbis lineatus. Walker : Jeffreys, Brit. Conch., i, 



p. 79; V, pi. V, f. 1. 



1863. Planorbis nitidus, Muller : Reeve, L. & F.-W. Moll. 



Brit. Is., p. 148, figs. 

 1873. Planorbis clessini, nov. sp. : Westerlund, Fauna Moll. 



Svec, p. 613. 

 1877. Planorbis (Hippeutis) Clessini, Westerlund : Clessin, 



Deutsch. Excur. Moll. Fauna, p. 420, f. 277. 

 1877. Planorhis (Hippeutis) nitida, Miiller : Clessin, o. c, 



p. 421, f. 278. 

 1884. Planorhis (Seqmentina) Clessini, Westerlund : Cle.ssin, 



o'.c, ed. 2, p. 4.?2, f. 294. 

 1884. Planorbis (Segmentina) nitidu, Muller : Clessin, o. c, 

 ed. 2, p. 433, f. 295. 



[Germain (Moll. France, ii, p. 260) gives as synonyms : — 

 Segmentina MontgazoncB, Bourg. ; and S. micro- 

 cephala, Charpentier.] 



First recorded as British in 1784, by Boys & Walker 

 (Test, minut. rar., p. 8, pi. i, f. 28). 



British Distribution in Time ; Cromerian to Recent. 



