68 HANDBOOK OF BRITISH MOSSES. 



by Bridel, under the name of Pterygophyllum, more on account 

 of habit than essential character. Bridel also refers the next 

 species to it, which is retained in Hookeria, by Schimper. If 

 the genus is ultimately adopted, it will be one amongst many 

 instances in which the species to which the generic name was 

 first applied, has been excluded from its own genus. 



2. H. Isete-virens, Hook, fy Tayl. ; stem procumbent, sub- 

 pinnate; leaves suddenly acuminate, ovate or ovate-oblong, 

 with a thickened margin, sharply toothed, binervate. Hook. 

 % Wils. t. xxvii. ; Eng. Bot. t. 2672. ; (Plate 3, fig. 6.) 



In shady places near rivulets and caves, in two or three 

 localities in Ireland. It has also been found near Penzance 

 by Mr. Ralfs. It is unknown on the Continent. Bearing 

 fruit in winter. 



Monoicous ; forming loose, rather flattened tufts of a deep 

 green, or occasionally yellowish. Stem an inch or more long ; 

 leaves much smaller than in the last, with much smaller cells, 

 somewhat waved when dry, opaque, not shining, margined, with 

 two divergent nerves springing from the base, arid extending 

 halfway up ; veil small, covering only the upper part of the 

 lid ; sporangium small, drooping ; lid of the same length, 

 with a straight beak ; outer teeth with two ridges on the back, 

 in which respect the peristome is very different from that of 

 the last, which approaches very near to that of Hypnum. 



ORDER IV. NECKEREI, Mout. Omaliea, Br. & Sch. 

 Stem mostly compressed and pinnate; fruitstalk usually 

 short, sometimes obsolete ; peristome double ; veil hood-shaped. 



6. NECKERA, Hedw. 



Stem pinnate, flat ; leaves mostly undulated ; sporangium 

 erect, symmetrical, immersed or exserted ; peristome double ; 



