Preface. vii 



time antl .'ittcntion, tliJit I liavc been unable to 

 collect and study the IIepatic;e in the field, and 

 therefore have to be content with the chronicle of 

 the labour of others rather than my own. It is 

 acknowledL^ed, on all hands, that such a Handbook 

 is urgently required, and if it should be the means 

 of increasing the number of students, or assisting 

 those who have alread}- commenced the study of 

 these interesting plants, it will justify the publica- 

 tion. 



M. C. Cooke. 



