In the present volume the description and illustration of the 

 Helicoid land mollusks will be completed. The first part (Part 29) 

 will continue and complete the account of the genus Cochlostyla. 

 The following part will contain additional species of Helix, being 

 a supplement to volumes III, IV, V, VI and VII. The two parts 

 remaining will contain a guide to the groups of Helices, a resume of 

 the anatomy of the group, and an Index to the species described in 

 volumes II to VIII of the MANUAL. 



For the constant sympathy, advice and criticism of correspondents, 

 as well as for valuable information and specimens, the author is 

 deeply grateful. Special thanks are due to Mr. Charles Hedley of 

 Sydney, N. S. \V. ; to Mr. John Ponsonby of London, Mr. H. Suter, 

 in New Zealand, Dr. J. C. Cox, Sydney, and to Dr. V. Sterki, New 

 Philadelphia, Ohio. 



H. A. P. 



