JVheldon : The North of England Harpidin. 



9i 



I have to record my grateful thanks to many kind friends for 

 specimens received during- the preparation of this paper, all 

 duly acknowledged under the respective species ; but I would 

 especially mention my indebtedness to Messrs. G. A. Holt, 

 E. C. Horrell, and A. Wilson, who have supplied both informa- 

 tion and specimens which have been of the utmost service ; 

 without such help, and that previously mentioned, this very full 

 list would have been an impossibility. 



Numerous records and specimens which have passed through 

 my hands are unnoticed in this compilation, owing to uncertainty 

 as to where they should be placed. A few to which less doubt 

 attaches, but which still require further observation before un- 

 qualified admission to our list, are enclosed in brackets [ ]. 

 After exercising every care, I cannot hope, however, that no 

 errors have been made. If more observers are induced to give 

 some attention to the abundant material our district provides, 

 errors will be weeded out, fresh facts brought to light, and the 

 object of this article accomplished. 



Basal Cells of the Four Groups of Hypnum fluitans. 



1. Group Amphibium. 3. Group exannulatum. 



2. Group falcatam. 4. Group Rotce. 

 1902 March 3. 



