Compiled by D'Arcy W. Thompson, of the University of Cambridge. Published by McMillan & Co., London. The interest manifested in the subject of the cross-fertilization of flowers may be illustrated by the fact, that we have here the titles of 814 papers given. Among the larger contributors to this extensive literature we find W. W. Bailey credited with 8 papers; W. J. Beal 7; A. W. Bennett 26; Charles Darwin 19; F. Delpino 29; A. Engler 7; Asa Gray 22; W. E. Heart 8; George Henslow 12; F. Hildebrand 32; W. H. Leggett 8; F. Ludwig 21; T. Meehan 60; C. E. Morren 9; Fritz Muller 18; Herman Muller 61; W. Tre-lease 14. Six of these larger contributors are American observers.