PREFACE 



** sand-bar " in the American usage of those terms. Substantives 

 in the headings have been shown by the use of a capital letter, 

 adjectives and other parts of speech by a small letter ; exceptions 

 being adjectives drawn from a proper name as " Darwinian," 

 and those which form part of such terms as *' Conjoint Bundle." 

 Greek is quoted in the original characters, Latin in italic, or 

 where otherwise it would be doubtful, it is indicated; this is 

 further explained on the page facing page 1 of the Glossary ; the 

 use of small capitals refers the reader to the word so printed for 

 a definition of the term, or to a correlative term. 



The Appendixes hardly need any detailed explanation ; it will 

 be seen that the Bibliography is a selected list of works chiefly 

 in alphabetic form, arranged chronologically. General diction- 

 aries, and large works in which technical terms form only a 

 small proportion of the whole, have been omitted. 



The pleasant duty now remains of acknowledging most grate- 

 fully the invaluable help I have received from a host of friends 

 during the progress of the work. I must name as principal 

 helpers, the following; the star prefixed shows help extended 

 to this edition. Mr. L. A. Boodle, F.L.S., Mr. N. E. Brown, 

 A.L.S., Mr. I. H. Bukkill, M.A., Sir Feancis Dabwin, F.R.S., 

 Prof. J. B. Farmer, F.R.S., *Dr. R. R. Gates, F.L.S., Prof. 

 M. M. Hartog, F.L.S., Mr. G. E. Massee, A.L.S., Dr. C. E. Moss, 

 F.L.S., Prof. H. H. W. Pearson, F.R.S., Mr. R. A. Rolfe, A.L.S., 

 Mr. E. S. Salmon, F.L.S., Dr. D. H. Scott, F.R.S., Mr. A. G. 

 Tansley, F.R.S., Prof. J. W. H. Trail, F.R.S., Dr. Harold 

 Wager, F.R.S., Mr. W. C. Worsdell, F.L.S., and Mr. C. H. 

 Wright, A.L.S. ; their help remains embodied in the text, 

 though six of the helpers have passed away. To all, my indebted- 

 ness is great, the value of this Glossary being largely due to 

 their ready aid. 



In every volume of similar character to this which I have had 

 to consult, I have found errors, sometimes numerous, occasionally 

 serious. This much larger volume offers a greater chance of 

 error, but I trust that comparatively few errors will be found. 



B. DAYDON JACKSON. 



Gla^kam: AiLgust, 1927. 



