ZONITES. 57 
be taken not to confound it with the young of Z. 
nitidus. 
Var. viridescenti-alba. Greenish white. 
7. Z. Nitipus (glossy). 
Rather solid, glossy, and semi-transparent, chocolate 
brown, transversely striated, faintly granulated under a 
microscope; whorls five; spire raised, apex blunt; suture 
deep; mouth round; umbilicus narrow, but deep; diameter 
a quarter of an inch. 
It is found at the roots of grass in moist places, not 
very abundantly. Its most distinctive characteristic 
is the absence of white on the under side. 
Var. albida. White. 
8. Z. excavdtus (hollowed out). 
Not very glossy, semi-transparent, light brown, coarsely 
striated ; whorls five and a half, nearly cylindrical; spire 
rather prominent; suture very deep; mouth nearly circular ; 
umbilicus very broad and deep; diameter nearly a quarter 
of an inch. 
This is a well-marked species. Its broad and deep 
umbilicus, its convex spire, cylindrical whorls, and 
coarse appearance combine to render it easy of identi- 
fication. The young shells are slightly carinated. 
It is found in various parts of England, Scotland, 
Ireland, and Wales, but it is a local shell. Not far 
