BALIA. 87 
motion; though my experience of the species is con- 
fined to a single locality in the north of Ireland, where 
it and its variety are abundant. 
There is no mistaking this species for any other, as 
its shape and toothless mouth mark it off distinctly 
‘from any of the foregoing, and its size from the follow- 
ine species. 
Var. columella. Longer, last whorl broader. 
10. V. MINDTissIMA (very minute). 
Cylindrical, glossy, different shades of horn-eolour; 
closely striated in the line of growth; whorls five and a 
half; suture deep; mouth similar to the last species, but 
somewhat quadrangular; umbilicus small. 
This beautiful little shell is found in a few places in 
Scotland and England. 
It is much smaller and narrower in proportion to its 
size than V. edentula, and is more strongly striated. 
Genus VIII.— BAIA. 
B. penversa (furned the wrong way). 
Sinistral, club-shaped, thin, dark horn-colour, semi- 
transparent, glossy, closely striated in the line of growth; 
whorls seven to eight; mouth squarish oval, sometimes fur- 
nished with a denticle on the columella; outer lip thin; 
awmebilicus narrow. 
