PREFACE. vii 



to the engravings in the text, a portion have been selected, after compa- 

 rison with the objects themselves, from the excellent illustrations of the 

 Mikroskopische Anatomie of Kolliker. Most of the woodcuts of plants are 

 careful reproductions of drawings contained in original works and memoirs 

 by Kiitzing, Corda, Tulasne, Bischoff, Bruch and Schimper, and others, 

 prepared for Payer's Botanique Cryptogamique, to which, as to almost every 

 illustration in this volume, the magnifying power used has been added. 

 Had not these beautiful woodcuts been accessible to the publisher, it 

 would have been impossible to have provided this work so richly with 

 illustrations. 



The authors have much pleasure in acknowledging -their obligations to the 

 Rev. M. J. Berkeley, Messrs. Westwood, W. S. Dallas, Sollitt, and Tuffen 

 West, for the loan of authentic specimens, or for information kindly afforded 

 on various subjects, and to Dr. William Francis, for constant advice and 

 assistance during the printing of the work. 



JOHN WILLIAM GRIFFITH. 



ARTHUR HENFREY. 



London, December 1855. 



PREFACE TO THE SECOND EDITION. 



I REGRET that the task of writing the Preface to this Second Edition of 

 the 'Micrographic Dictionary' falls upon me alone, the hand of Death 

 having just been laid upon my distinguished and most amiable friend and 

 coadjutor. It will, however, be satisfactory to the reader to know that the 

 whole had passed under the hands of the late lamented Professor Henfrey, 

 and that he had taken his share in correcting for the press all but the last 

 three sheets. 



The work has been revised throughout, and has received considerable 

 alterations and additions. The progress of Structural and Physiological 

 Botany was always assiduously watched by Professor Henfrey; and the 

 articles on Botanical subjects have been greatly enriched by the additions 

 which his extensive and accurate knowledge suggested to him. Great 

 improvements have also been introduced into many of the articles relating 

 to the Animal Kingdom, especially in the classes Insecta, Tunicata, 

 Polyzoa, and Foraminifera, some members of which have lately attracted 

 much attention. The new figures added are also numerous. 



The critical reader will, it is hoped, consider that the great range of 

 subjects embraced, renders it impossible to do justice to all of them; and in 



