PREFACE. vu 
ing many exquisite photographs of the characteristic habitats of various 
species, but by his active help in working out the molluscan fauna of 
Ireland, and interesting others in the same good work. 
'l'o the many other helpers and good wishers who have so consistently 
assisted me at every opportunity, and whose help is in every case 
acknowledged in its appropriate place in the text, I desire to express 
my sincere thanks and heartfelt appreciation of their kindness, and can 
only hope that the resultant volume now completed will to some degree 
realize the hopes and expectations formed regarding it. 
JOHN W. TAYLOR. 
NortH GRANGE, Horsrorta, 
Leeps, Dec. 31, 1906, 
™ 
