PREFACE 



Descriptive matter relating to Pupillidae is completed in the 

 present volume. A summary of the anatomical structure and 

 notes on the distribution will form part of the volume to 

 follow. 



In addition to many friends in Europe, America, Australia 

 and Asia who gave material and information acknowledged in 

 former volumes, I would here thank those who have contributed 

 to this one. Dr. F. Haas of the Senckenberg Museum has 

 given an admirable exposition of the Pyrenean Abidas and 

 Chondrinas which makes amends for the inadequate treatment 

 of these groups in volumes XXIV and XXV. Mr. P. Hesse 

 of Venice generously lent unfigured types of various Orculae 

 and Agardhiae from his collection. Dr. A. Wenz contributed 

 catalogues of the Tertiary species of various European genera. 

 Mr. J. R. Le Broeton Tomlin, Dr. V. Sterki, Dr. Bryant Walker 

 and Professor T. D. A. Cockerell lent types and other speci- 

 mens from their collections. Finally, my old friend and 

 collaborator Dr. C. Montague Cooke, joined with me in supple- 

 mental work on Hawaiian species. 



I wish also to express my appreciation of the work of Mr. 

 E. G. Vanatta on the Index, and of Miss Helen Winchester, 

 who drew the illustrations for this and the preceding volumes. 



Figures copied from other publications have been reproduced 

 from the originals photographically, the sources being duly 

 acknowledged in the Explanation of Plates. 



H. A. P. 

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