vi 



PREFACE. 



works referring to the subject or subjects treated of 

 is appended. These bibliographies do not pretend to 

 absolute completeness. 



The first volume contains a glossary and introduc- 

 tion, and treats of the Fungi, the Bryophytes, and the 

 Root, Stem, and Leaf of the higher plants. The 

 Algse are not included, as exhibiting too few abnor- 

 malities to make description worth while. An his- 

 torical account of previous memoirs on the subject is 

 not given, as most of the main ones were brought 

 forward by Masters, and since the publication of his 

 work only one teratological treatise of real import- 

 ance has appeared, viz. Penzig's encyclopaedic work, 

 6 Pflanzen-teratologie ' (of which a new edition is 

 in preparation). But references to earlier publica- 

 tions will be found in the general bibliography follow- 

 ing the introduction. 



It will be seen that many of the illustrations are 

 taken from the works of other authors. This is quite 

 unavoidable, for if the opportunity of an original 

 sketch or photograph had in every case been waited 

 for, the work would never have been written. 



It will be completed in a second volume dealing 

 with the Flower. 



The writer is indebted to the Director and other 

 members of the staff of the Royal Gardens, Kew, for 

 the ample facilities afforded for his study of this 

 subject, making all necessary investigations, and for 

 the supply of a considerable amount of material. He 

 desires to thank all those in different parts of the 

 country (too numerous for individual mention) who 

 have so kindly given him interesting specimens during 

 a number of years ; no small proportion of these has 

 been obtained at the meetings of the Scientific Com- 



