VI PREFACE TO WEST EDITION. 



arrangement amongst us ; and more particularly as 

 both Dr. Braithwaite and the Rev. J. Fergusson arc 

 engaged upon more critical examinations, prior to tho 

 publication of new and more natural arrangements. 

 The Analysis of the Genera is principally founded upon 

 the same part from Wilson, and is intended not as an 

 arrangement, but merely a key. 



I must here express my gratitude and thanks to 

 those gentlemen who have so kindly assisted me in its 

 preparation, both with the loan or gift of specimens of 

 the rarer and newer species, and also for the diagnoses 

 received from several, where specimens were not at- 

 tainable. Amongst these gentlemen I must specially 

 thank Dr. Hooker for his kind permission to use the 

 Herbarium specimens and Library at Kew, and Mr. J. 

 G. Baker, F.L.S., for his valuable assistance iu doing 

 so; also Dr. Braithwaite, F.L.S. ; Mr. J. Bagnall, of 

 Birmingham ; Dr. F. Buchanan White, of Dunkeld ; 

 Dr. Fraser, of Wolverhampton; Rev. J. Fergusson, of 

 New Pitsligo; Mr. Carruthers, F.L.S., of the British 

 Museum; Mr. G. B. Hunt, of Manchester; Mr. John 

 Sim, of Strachan; Mr. W. Gait, of Edinburgh; M. P. 

 Goulard, of Caen, Calvados ; and, lastly, all those 

 gentlemen and ladies who so readily came forward as 

 subscribers to the number of upwards of 200, to assist 

 in the publication of the volume. 



CHAS. P. HOBKIRK. 



HUDDERSFIELD, 



February, 1873. 



