288 87. FiLiCES. 



smaller than I was accustomed to meet with m the Azore 

 islands, where this fern occurs in numerous places, and 

 also varies much in size. 



1407. Hyjienophyllum tunbridgense, Sm. 



Area 1 2 3 [* 5] 6 7 * 9 10 * 13 13 [14 15] 16 [17]. 



South limit in Cornwall, Devon, Sussex, Kent. 



N. limit in Mnll (J. T. Syme), Dumharton (W. Gourlie). 



Estimate of provinces 10. Estimate of counties 20. 



Latitude 50 — 57. Atlantic tj^pe of distribution. 



Agrarian region. Inferagrarian — Superagrarian zones. 



Descends to the coast level, in the Peninsula. 



Ascends to 400 yards, more or less, in same province. 



Range of mean annual temperature 62 — 47. 



Native. Rujpestral. As the name of "tunbridgense" 

 was originally used to include both the present species 

 and its close ally H. "Wilsoni, the older records of locali- 

 ties cannot certainly be assigned to either one apart from 

 the other, until the stations shall have been again verified. 

 The counties that would be temporarily rejected on this 

 ground are too numerous to be quoted with their authori- 

 ties. Those of Cornwall, Devon, Somerset, Sussex, Kent, 

 Glamorgan, Merioneth, Lancaster, York, Lake-Lancaster, 

 Dumfries, Dumbarton, Argyle, are all authenticated by 

 recent observers, competent to apply the specific names 

 correctly. H. tunbridgense will likely be fomid in many 

 other counties ; but I have not ventured to increase the 

 estimate of provinces beyond the ten represented by the 

 thii-teen counties enumerated. Type of distribution in- 

 termediate between Scottish and Atlantic ; or, perhaps, 

 really between Highland and Atlantic. 



