236 MR. G. E. HUNT ON MOSSES NEW TO BRITAIN. 



trifariously arranged. Frequent on rocks and walls in 

 mountainous districts. Fruitj wHch is very rare^ occurred 

 at Buxton, June 1865, 



Tortula fragilis, Wils. Distinguished from all other 

 species of Tortula and Trichostomum by its very fragile 

 and brittle leaves, thick, opaque above, with very large 

 diaphanous cells below, and subulate in the upper por- 

 tion, usually broken. Ben Lawers, Mr. A. M^Kinlay, 

 Sept. 1865. 



Grimmia commutata, Brid. MoncriefF Hill, Perth, by 

 Dr. Stirton, July 1864; and more lately at Stenton E,ocks, 

 near Dunkeld, with fruit, Dec. 1865, Dr. White of 

 Perth. 



Grimmia subsquarrosa, Wils. MS. Stenton Rocks, 

 Dunkeld, Dr. White. 



Grimmia Hartmanii, Sch. Bocks, Wales and Scotland, 

 probably not unfrequent. First pointed out by Mr. Wil- 

 son. 



OrthotricJium Sturmii, Hoppe. Distinguished from 0. 

 7'upestre by its indistinctly 8 -striated capsule, 16 equi- 

 distant teeth, and absence of inner peristome. Trap 

 rocks, Scotland and Ireland. First pointed out by Dr. 

 Wood. 



OrthotricJium anomalum, Hedw. and of Bry. Europsea, 

 but not of Bry. Brit., which is now named Orth. saxatile, 

 Brid. Dr. Wood first pointed this out as a British species 

 from specimens gathered at Aberdour, Fifeshire. Fre- 

 quent in Scotland, occurs at Conway, always on trap rocks. 

 Capsule i6-striated and peristome-teeth equidistant. O. 

 saxatile always on calcareous rocks ; capsule 8 -striated and 

 peristome-teeth in pairs. 



Orthotrichum Shawii, Sch. (0. orneum, Wils. MS.). 

 Distinguished from 0. rupestre, which is abundant on trees 

 in Scotland, by the beautiful white teeth of its peristome, 

 reflexed so far as to lie back on the sides of the capsule. 



