ANONACEX® OF BRITISH INDIA. 11 
Department, Madras; to Mr. J. S. Gamble, F.L.S., Director of the Forest School, Dehra 
Dun; and to Mr. J. F. Duthie, F.L.S., Director of the Botanical Survey of Northen 
India, I have also to acknowledge, with grateful thanks, the kindness and courtesy of 
the authorities of the Royal Herbarium at Kew, who facilitated my researches in every 
possible way by putting the resources of that superb collection at my disposal 
during a prolonged course of study there. To my good friend and_ colleague Dr. 
D. Prain I am indebted for much excellent advice and criticism during the progress 
of the work. Dr. Prain has also to a large extent corrected the proofs of the litho- 
graphs, which have all been executed by Bengali artists in Calcutta. 
