FAMILY COLIMACEA. 



83 



Lucena pulchella, Hartmann (1821), Si/st. Gast. p. 54. 



Vallonia rosalia, Eisso (1826), Hist. Nat. JEurop. Merid. vol. iv. p. 102. 



pi. iii. f. 30. 

 Amplexus paludosus and crenellus, Brown (1827), III. Conch, pi. xli. f. 70 



to 78. 

 Chilostoina pulchella, Fitzinger (1833), Syst. Verz. p. 98. 

 Circinnaria pulchella, Beck (1837), Ind. Moll. p. 23. 

 Comeola pulchella, Held (1837), Isis, p. 912. 

 Helix (LticenaJ pulchella, Moquin-Tandon (1855), Hist. Moll. vol. ii. 



p. 140. pi. xi. f. 28 to 34. 

 Hah. Throughout Europe. Madeira. Azores. Thibet. United States. 



(Under stones or wood, or on walls, either in wet or dry places.) 



Of all Helices this minute species is the widest distributed over 

 the globe. It is generally diffused throughout Europe, including 

 the British Isles ; it is recorded by G-erstfeldt from Siberia; it is 

 found at Madeira and the Azores ; it was collected by Dr. Thomson, 

 in 1848, in Thibet; and it inhabits the United States from Maine to 

 South Carolina, and from Vermont to the Missouri. The animal 

 and shell are alike delicate and colourless, save with a faint tinge of 

 yellow ; the shell is of an elegant Cyelostoma-Yike form, the aperture 

 expanding at maturity like the mouth of a trumpet, with a thickened 

 reflected lip, of which the margins are almost continuous. The 

 epidermis forms rib-like folds, so characteristic in appearance that 

 they have been mistaken for calcareous ribs, while denuded speci- 

 mens have been described as another species. 



22. Helix rotundata. 'Rounded Helix. 



Shell; very largely perspectively umbilicated, thinly depressed, 

 almost discoid, horny yellow or fulvous fawn, 

 mostly stained or tessellately spotted with fuscous 

 red, spire more or less convex, sometimes rather 

 flat, sutures impressed, whorls six, narrow, rounded, 

 densely arcuately rib-striated throughout, ob- 

 tusely produced at the periphery ; aperture de- 

 pressly lunar, Hp simple. 



Helix rotundata, Miiller (1774), Verm. Hist, part 2. p. 29. 



Helix radiata, Da Costa (1778), Test. Brit. p. 57. pi. iv. 

 f. 15, 16. 



Helix Turtoni, Fleming (1828), Brit. A nim. p. 269. 



o2 



