PUPA. 79 
moss, dead leaves, &c. As Dr. Jeffreys remarks, 
“the spire varies greatly in length,” some individuals 
not being half the length of the full size, which is 
between one-seventh and one-eighth of an inch. 
The young are carinated and have a well-marked 
umbilicus. 
Var. I. edentula. Denticle absent. 
Var. II. alba. White. 
4, P. MARGINATA (margined). 
Cylindrical, rather solid, dull, brown horn-colour ; whorls 
six to seven; striated finely in the line of growth; mouth 
nearly circular, sometimes furnished with a denticle similar 
to that of the last species. Outside there is a white rib, not 
quite at the margin, which is thin and unreflected. 
This species is specially fond of sandy soils near the 
sea coast, but is frequently found inland. Generally 
distributed. 
P. marginata and P. umbilicata differ in the following 
respects :-— 
P. UMBILICATA. P. MARGINATA. 
Smooth and glossy. Dull, striated. 
Ovate. Cylindrical. 
Mouth _horseshoe- Mouth smaller, nearly 
shaped, with a thick circular, lip not re- 
reflected lip. flected, but thickened. 
