sh. PREFACE. 
In compiling this little Manual, I must express 3 
my indebtness to my friends, Mr. Baker Hudson, 
Mr. Brockton Tomlin, B.A., Miss F. M. Hele, Mr. 
W. Collinge, Mr. W. Nelson, and Mr. J. W. Taylor, 
the Editor of “The Journal of Conchology,’ for 
supplying me with much valuable information and 
help. To the works and papers of Gwyn Jeffreys, 
Alfred Moquin-Tandon, Baudon, Carl Agardh 
Westerlund, O. Boettger, Colbeau, Fischer, Ralph 
Tate, Macalister, Huxley, Gegenbaur, Balfour, 
Rymer Jones, Milnes Marshall, Ashford, Ralph 
Tate, Woodward, E. Von Martens, Rimmer, 
Roebuck, Nelson, Simroth, Taylor, Adams, Emil 
Adolf Rossmassler, Lessona and VPollonera, Gray, 
Turton, Catlow, Locard, Picard, Pascal, Dumont, 
Mortillet, and Cockerell, I must also express my 
obligations. 
The varieties described include those which have 
been verified by the Council of the Conchological 
Society or by myself; and any deviation from the 
typical form found by the collector not mentioned 
in this volume should be sent to the Referee Council 
of the Conchological Society, Leeds, for verification. 
J WAV 
51, Park VituacEe East, N.W. 
