Fi s- 



25. H. aperta. — H. neritoides, naticoides, etc. — A single specimen 



found in Guernsey. Not uncommon in S. Eu. Our specimen 

 is foreign. 



26. H. umbilicata, Mont. — H. rupestris, etc. — On perpendicular 



heights and under stones, C. 



27. H. pygjlea, Drop. — H. minuta, etc. — Common in damp places. 



28. H. lamellata, Jeffreys. — II. Scarbtirgensis, seminulum. — Brit, and 



Germany, C. 



29. H. aouleata, Mutter. — H. spimilosa, etc. — Among Moss and 



stones, etc., C. General. 



