42 



BRITISH MOLLUSKS. 



chusetts, remarks that it crawls over the mud and up the stalks of 

 plants ; and although it seems to be but little incommoded by water, 

 it cannot endure being entirely submerged, and appears not to have 

 the power of directing its way in the water, though it will generally 

 float. 



The British species are : — 



1. putris. Shell ovately inflated, yellowish. 



2. elegans. Shell constrictedly fusiform, reddish amber. 



3. oblonga. Shell oblong-turbinated, but little inflated, yellowish. 



1. Succinea putris. Filthy Succinea 



Shell ; oblong-ovate, very thin, trans- 

 parent, yellowish, spire small, whorls 

 slightly contracted at the suture then 

 convex, densely longitudinally pli- 

 cately striated, last whorl much the 

 longest, inflated ; aperture ovate, co- 

 lumella thinly reflected. 



Helix putris, Linnaeus (1758), Si/st. Nat. 10th edit. p. 774. 



Helix succinea, Muller (1774), Verm. Hist, part ii. p. 97. 



Turbo trianfractus, Da Costa (1778), Test. Brit. p. 72. pi. v. f. 13. 



Bulimus succineus, Bruguiere (1789), Hue. Meth. vol. vi. p. 308. 



Helix limosa, Pulteney (1799), Cat. Dorset, p. 48. 



Succinea amphibia, Draparnaud (1801), Tabl. Moll. p. 55. 



Amphibulina succinea, Lamarck (1805), Ann. du Mus. vol. vi. p. 236. 



Lucena putris, Oken (1815), Lehrb. Nat. vol. iii. p. 312. 



Succinea Mulleri, Leach (1820), Sgn. Moll. p. 58. 



Tapada putris, Studer (1820), Kurz. Verzeichn. p. 86. 



Amphibina putris, Hartmann (1821), Neue Alpina, vol. i. p. 247. 



Helix (Cochlohydra) putris, Ferussac (1822). Tabl. Moll. p. 26. pi. 9. 

 f. 4 to 10. pi. ix. f. 7 to 10. 



Succinea putris, Fleming (1828), Brit. Anim. p. 267. 



Hab. Throughout Europe (on mud and flags). 



The typical form of this species is oblong-ovate, with a small spire 

 and only a slight constriction of the sutures ; but when limited even 

 to this, and referring the variety gracilis to a distinct species, 8. 

 elegans, there is yet so varied a modification in the coiling of the 

 shell as to induce M. Moquin-Tandon to characterize nine separate 

 varieties. In colour it is uniformly of a yellowish amber. Mr. 



