FAMILY COLIMACEA. 115 



land and Ireland, but not in Scotland. V. aljoestris, with a similar 

 range on the Continent, has only been collected in the north of 

 England ; while V. vertigo and Moulinsiana, both natives of Central 

 Europe, have been found in Britain, the first only in the west of 

 England and Ireland, the second only in the west of Ireland. 



The distribution of the species, generally, agrees pretty nearly with 

 that of Pupa. Of about seventy hitherto described, twenty-five are 

 European, two Syrian, eight Madeiran, three Indian, three from 

 Tenerifle, one Mauritius, three South Africa. The proportion in 

 the number of species of Vertigo to Pupa, is smaller in the West 

 Indies than in Britain, but larger in the United States, where they 

 include several species very closely allied to our own, but none in 

 common. Three species of Vertigo have been recorded from Chili 

 and Peru, and one from Brazil. 



The British species are : — 



1. antivertigo. Shell tumidly cylindrical, of four to five semi- 



transparent fuscous whorls ; aperture six to nine-toothed. 



2. Moulinsiana. Shell tumidly ovate, of four to five very glossy 



semitransparent yellowish whorls ; aperture two to four- 

 toothed. 



3. pygmsea. Shell ovately cylindrical, of four to five semitrans- 



parent reddish or fulvous whorls ; aperture four to five- 

 toothed. 



4. alpestris. Shell oblong-cylindrical, of four to five transparent 



narrow fulvous-olive whorls ; aperture four-toothed. 



5. striata. Shell minute, shortly cylindrical, of four to four and 



a half transparent tumidly rounded strongly striated whorls ; 

 aperture four to six-toothed. 



6. pusilla. Shell minute, stoutly cylindrical, of four to five 



semitransparent olive-horny whorls convoluted sinistrally ; 

 aperture six to seven-toothed. 



7. vertigo. Shell minute, ovately cylindrical, of four to five 



semitransparent oHve-horny whorls convoluted sinistrally ; 

 aperture four to five-toothed. 



8. edentula. Shell minute, narrowly straightly cylindrical, of 



six to six and a half thin yellowish-horny whorls ; aperture 

 toothless. 



9. minuta. Shell very minute, oblong-cylindrical, of five to five 



and a half strongly striated tumidly rounded whorls ; aper- 

 ture toothless. 



i2 



