50 HELICID^E. 



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 L. 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. 



