SEGMENTINA 89 



Post 1 Planorhis nitidus, Miiller : Brown, Illnst. Conch. Brit., 

 Sept. [ od. 2, p. 33, pi. xiv, f. 50 & 51 [in text 48 



1840.) & 49]. [Non Muller.] 



1841. Hippeutis lenticularis : Hartmann, Erd- & Sussw.- 



Gasterop., p. 51, pi. xiii & xxiii. 

 1841. Planorhis helicoides : Brown (J.), Ami. & Mag. Nat. 



Hist., vii, p. 429. 

 1845. Planorhis nitidus, Muller : Brown, Illust. L. & F.-W. 



Conch. Brit., p. 23, pi. iv, f. 1 & 2. [Non 



Miiller.] 

 1850. Planorhis {Scgtne,ntina)fonlanus : Stein, Lebend. Schneck. 



& Musch. Berlins, p. 78. 

 1850,^^ Segmentina complanala, Drap. : Zelebor, Ber. & 

 Nov. / Mitlheil. Freund. Naturw. Wien, vii, p. 226. 



1852. Planorhis nitidus, Miiller : Forbes & Hanley, Brit. 



Moll, iv, p. 161, pi. cxxvii, f. 11 & 12. 



[Non Miiller.] 



1855. Planorhis (Helicorhis) nitida. Gray : Benson, Journ. 



Asiat. Soc. Beng., xxiv, p. 126. 

 1855, ~\ Planorhis (Nautilina) nitidus, Miill. : H. & A. Adams, 

 Nov. / Genera Moll, ii, p. 263. [Non Miiller.] 



1856. Planorhis {Hippeutis) fontanus, Lightfoot : Moquin- 



Tandon, Hist. Moll. France, ii, p. 426, 

 pi. xxx, f. 10-17. 



1857. Planorhis (Hippeutis) fontanus, Lightf. : Gray, in 



Turtou's Manual, new ecL, p. 243, pi. viii, 

 f. 93. 



1862. Planorhis nitidus, Miiller : Jeffreys, Brit. Conch., i, 



p. 81 ; V, pi. V, f. 2. [Non Miiller.] 



1863. Planorhis fontanus, Lightfoot : Reeve, L. & F.-W. Moll. 



Brit. Is., p. 147, figs. 

 1873. Planorhis {Hippeutis) complanatus, Lin. : Westerlund, 

 Fauna Moll. Svec, p. 402. 



First recorded as British in 1786, by J. Lightfoot, as 



Helix font ana. {See ref. above.) 

 British Distribution in Time : Pleistocene to Recent. 



Genus: 2. SEGMENTINA, Fleming. 



Etyni. : — Lat. dimin. of segnirnliiin, a section. 

 Type : — Planorhis niiidus, Miiller. 

 {Planorhis, Nautilus, Helix, vett. auctt.) 



1818. Segmentina : Fleming, Suppt. 4-6th ed. Ency. Brit., 



iii, " Conchology," p. 309. [" From the 

 trivial name bestowed on it by Solander." 

 (Fleming, " Moll. Anim.," 1837, p. 99.)] 



1819. Hemithalamus : Leach, Moll. Brit. Synop. (proofs), 



p. 137. 



