50 HELICID &. 
lately they were regarded as doubtfully specifically 
distinct. Recent research, however, has shown a 
difference in the lingual dentition of the two 
species. 
The main external difference between them is the 
more slender shape of the elegans; besides which, the 
suture close to the mouth is much deeper. 
Both are found together in the same localities, and 
are equally common. 
Var. I. minor. Smaller, thinner, reddish brown. 
Var. II. ochracea. Smaller, thicker, larger spire, 
and smaller mouth. 
3. S. OBLONGA (oblong). 
Shaped somewhat like DL. truncatula, rather more solid 
than the two last species; brownish yellow horn-colour ; 
whorls three to four, convex ; suture deep. 
This is a rare species, found near the sea-coast at 
Swansea, North Devon, Glasgow, and Cork. 
It is very distinct from the other two species, being 
very much smaller, with a longer spire in proportion - 
to its size, and a very deep suture. 
