of British MoUusca. 341 



274. rianorhiti nmhUicatus^ 3Iull., = /*. complanatus, JetTr. 

 (non Linn.). 



P. complanatus J L., is generally now regarded as P. nilidas^ 

 and not the present species, wliich, however, has been called 

 comphiuata by Stein, Dupuy, Moquin-Tandon, Locard, 

 Bourguignat, <kc. 



275. Planorbis vortex (Linn.). 



276. Planorbis spirorhis (Linn.). 



[Planorbis dilatatuSy Gould. 



Planorbi.'i (Ulntatm, Gould, Invert. Mass. (1841), p. 210, \v^. 140; ibid." 

 edit. Biniiev (1870), p. 49S, lig. 748 ; Rogers, .Joiiru. Conch, vol. i. 

 (1874), p. 81. 



An accidentally introduced species, which appears to have 

 established itself in the neighbourhood of Mancliester in the 

 Bolton Canal at Pendleton and Galton {Thds. Rogers).'] 



277. Planorbis glaher^ Jeffreys. 



278. Planorbis albus, Miiller. 



279. Planorbis nautileus (Linn.). 



280. Planorbis complanatus (Linn.) = P. 7iitidus, Griiy= 11. 

 fontanus, Lightfoot. 



Genus 5. Segmentina, Fleming. 



28L Segmentina nitida (Miill.) = Planorbis lineatus (Walker), 

 Jeffr. 



Judged out of his own work, by comparing what is said of 

 ]\Iuller's Planorbis nitidus in vol. i. p. 80, and vol. v. p. 172, 

 Jeffreys shows that that species is the present and not the last 

 to which he referred it. 



Fam. IL Physidae. 

 Genus \. Physa, Lamarck. 



282. Physa fontinalis (Linn.). 



Subgenus Aplexa, Fleming. 



283. Physa hypnorum {lArm.) . 



[To be continued.] 

 Ann. & Mag. N. Hist. Ser. 6. Vol. vi. 24 



