ll. PREFACE. 
To Dr. Scharff, of Dublin, I am indebted for permission to 
reproduce some of the figures in his * Slugs of Ireland,’ and to Mr. 
A. Sich for his drawings of Avzon ater, and of Amala sowerby?. 
Mr. J. Wetherall has kindly photographed the four smaller /¢szd7a, 
a feat that several have attempted with, [ think, inferior results. 
Though it is impossible to attempt a complete list of the very 
numerous friends and correspondents who from time to time have 
given me much valuable assistance, I must mention Messrs. R. D. 
Darbishire, E. A. Smith, C. Oldham, G. Sherriff Tye, J. Rogers, 
J. R. B. Masefield, W. Moss, Canon Norman, and the Rey, J. W. 
Horsley. 
In conclusion I cannot refrain from a tribute to the study of 
conchology itself. To it | owe many valued friends, and, engaged in 
it I have spent some of the happiest times of my life. ©=An hour with 
my collections or a stroll along a country lane in search of snails has 
often done more to dissipate the worries of an arduous professional 
life than anyone but a naturalist would believe. 
LIONEL E. ADAMS: 
——— + >o<+—_— 
