LAND AND FliESHWATER MOLLUSOA 



OP 



INDIA 



VOL. III. 



Part I,— NOVEMBER 1920. 



(Plates CLIX.-CLXV.) 



INTRODUCTION. 



In spite of the very limited interest which is taken in the auimals 

 of the land moUusca, I am induced to commence Volume 111. of 

 this work ; for until the species in the many Oriental genera 

 are collected, their anatomy made known, and their true habitat 

 recorded, any attempt to use them for classification or any deeper 

 research is not possible. The work of the Conchologist is simply 

 useless unless this is done and the physical features of India are 

 taken into account. During the war I have uot been able to 

 carry on this publication, begun 37 years ago and ended in 

 two volumes in l'JI4. On the other hand, I have had leisure 

 to do much with the material in my hands, and to add to it, 

 especially specimens preserved in spirit, and have described the 

 auimals of many Indian Genera previously unknown. I have 

 had much support — more than I had hoped to receive — and from 

 many quarters : for this I cannot express my thanks too strongl}". 

 I must especially notice Dr. N. Anuandale, with Messrs. S. W. 

 Kemp and F. H. Graveley of the Indian Museum. 1 feel it a duty to 

 those who have supplied material, to put what I have brought 

 to light on record, as a starting-point for those who will follow 

 me in this wide and difficult field of research, so full of deep 

 interest to anyone who enters it. 



PAllX I. B 



