366 Mr. W. Mitten on the Mosses and Hepatica of Sttssea;. 



by Mr. Jenner by the roadside between Icklesham and Winchelsea, 

 where it is very plentiful ; it has also been met with in small quantity 

 in several places about Hurstpierpoint. 



[The plant in a barren state has been gathered at Reigate and 

 Betchworth in Surrey by Mr. Borrer, and by Mr. Wilson near War- 

 rington.] 



In size and mode of growth this species closely resembles some of 

 the larger forms of J5. capillar e found on moist sandy banks. The 

 stems are seldom more than half an inch in height, densely covered 

 below with brown radicles ; the leaves are erecto-patent, not twisted 

 nor spreading, oblong-ovate, and not so much inclining to a spathu- 

 late figure as those of B. capillare ; the nerve is stout, and does not 

 run into a hair-Uke point, but forms a stiff mucro at the apex of the 

 leaf ; the margin is thickened and towards the apex denticulate ; the 

 capsules are cylindrical, of a brown-red colour when mature, the 

 operculum conical, acute, and shining. 



Dr. Greville has given an excellent figure of this species in the 

 place above quoted, and through his kindness the original specimens 

 from the Ionian Islands have been compared with the Sussex moss. 



B. Donianum may always be known by its erecto-patent, thickly 

 margined, stoutly nerved leaves, with a short and rigid mucro. 



134. B. pseudo-triquetrum, Hedw. 

 B. ventricosum, Dicks. 



Frequent in bogs and wet places. 



135. B. alpinum, Linn. 



In small quantity on Henfield Common, and by the margin of Til- 

 gate Pond in Tilgate Forest : sterile. 



136. B. pallens, Sw. 



B. turbinatum, Eng. Fl. 



Common ; but rare in fruit. 



On the forest between Balcombe and Handcross a slender form 

 of this species has been gathered with an imperfect internal peristome, 

 the cilia being rudimentary and destitute of appendages ; in other 

 respects it corresponds with the usual state. 



137. B. capillare, Hedw. 



Abundant on roofs, walls, rocks, trees, and on the ground. 



This common species offers a good subject in which to observe by 

 analogy the variations to which allied species are subject. The mar- 

 gin of the leaves is liable to the greatest variation ; and in those states 

 in which it is most evident, it is always more prominent and thickened 

 in the perichsetial leaves. 



The authors of the ' Bryologia Europsea ' have taken as their ty- 

 pical form that in which the nerve of the leaf ceases just below the 

 apex, and the hair-like point is composed of the united margins. 

 This form is common on shaded banks and in woods. C. Miiller, in 

 his Synopsis, describes as the normal state that with an excurrent 



