Mr. W. Mitten on the Mosses and Hepaticce of Sussex. 315 



60. B. vinealis, Brid. 



Common on walls, growing on the sides rather than on the tops ; 

 not often in fruit. The form /3. fiaccida is very common on Ledge- 

 banks, but always sterile. 



61. jB. squarrosa, Brid. 



Tor tula squarrosa, De Notaris, Spruce in Lond. Joum. Bot. 

 Beeding chalk-pit, Mr. Borrer. In small quantity on Woolsonbury 

 Hill, and elsewhere on the Downs, but it is not rare on the chffs be- 

 tween Brighton and Newhaven, and between Shoreham Harbour and 

 the sea : always sterile. 



62. B. tortuosa, Hedw. 



Tortula tortuosa, Hedw. Eng. Fl. 

 Tottington Mount, Mr. Borrer ; Slindon, Mr. Jenner. 



63. B. marginata, B. et S. 



Tortula marginata, Spruce in Lond. Joum. Bot. 

 Frequent on sandstone walls, and less commonly on bricks ; it 

 occurs also on the sand rocks. 



64. B. muralis, Hedw. 



Tortula muralis, Hedw. Eng. Fl. 

 Everywhere on walls and stones. 



65. B. canescens, Bruch; ^^monoica^ gregaria, csespitosa, hu- 

 milis, subsimplex ; foliis obovatis et late ovalibus, costa elongata 

 pilosis, margine revolutis, capsula erecta, symmetrica, oblonga, 

 opereulo conico, peristomii membrana basilari in tubum oblique 

 tessellatum longe producta." — Bryol. Europ. Barbula, p. 34. 1. 19. 



Cliffs near the Lovers' Seat, Hastings, Mr. Jenner, 1844; it has 

 since been gathered in the same place by Mr. Borrer. 



Closely resembling B. muralis, but rather less in all its parts. The 

 stems are short and almost buried in the fine loose sandy earth of the 

 locality ; the leaves in the lower parts of the stem are oblong or ob- 

 long-obovate, the upper ones are oval oblong and a httle acuminate, 

 concave, with the margins reflexed ; the nerve is very stout for the 

 size of the leaves, and excurrent into a diaphanous hair-like point, 

 which in the lower leaves often equals the length of the whole leaf, 

 in the upper it scarcely exceeds one- fifth ; the setse are yellow, and 

 the oblong capsules orange-brown ; the peristome is about half as 

 long as the capsule, and tubular about half its own length ; the oper- 

 culuni is conical, and the calyptra covers about half the capsule. 



This moss may at all times be known from B. muralis by the 

 long tubular base of the peristome, which corresponds with that of 

 B. mneifolia, B. ruralis, and B. subulata ; besides this difference the 

 leaves are broader, the upper ones rather acuminate, and all of a less 

 firm and close texture than in B. muralis, and its habit is to grow on 

 the earth, where B. mxiralis is rarelv seen. 



