NEW OR RARE BRITISH MOSSES. 99 
entire leaf can be discovered. ‘The areolation is similar to that of 7. 
mutabile, except that the hyaline cells ascend at the margins, but occupy 
a much less space than they do in 7. flavo-virens. 
In the ‘ Bryologia Europea,’ as well as in the Synops. Muse. Europ. 
there is mentioned under 7. mutabile a “var. B. densum," which is 
described as a smaller Moss, with “lanceolate leaves.” This is also 
described in the same manner in the ‘ Bryologia Britannica.’ No 
locality or other remark is made upon it in any of these works, and it 
must be different from the following :— 
T. littorale. Stems growing in compact patches or tufted, more or 
less elongated, simple or divided by the growth of innovations. Foliage 
more or less distinctly interrupted and comose, the younger green or 
yellowish-green, the older becoming brown and persistent. Leaves 
erecto-patent, slightly recurved towards their points, all oblong- 
ligulate, obtuse, channelled, towards the apex subcomplicate; the 
nerve excurrent into a short mucro; at the base of the leaf the cells 
are pellucid, oblong and rectangulate; these occupy a space less in 
length than the width of the leaf, and do not ascend at the sides; 
above these the cells become gradually shorter, and all those occupy- 
ing the upper portion are rounded and obscure.—HaB. Ireland (Drum- 
mond) ; Whitsand Bay, Cornwall (Mr. Brent, communicated by Mr. 
Holmes) ; below the cliffs, east of Hastings, in sandy ground. 
Quite as tall as T. mutabile, but a much more slender-looking Moss, 
from its leaves being only about one-third as long as they are in that 
species. "The leaves, from their shortness, subcomplicate, obtuse, not 
hooded points, and more erect position, have a different appearance 
from those of any of the other allied species, and cannot be said to 
have an outline that could be described as lanceolate. 
EXPLANATION OF PLATE BAS ViL 
1. Fertile plant, natural size, completed from Müller's Sardinian specimens ; 
2. Leaf; 3. Capsule entire; Portio: 
flavo-virens. 5. Stem of natural size ; 6. Leaf, magnified, of T. defractum.. 
7. Stems of natural size ; 8 and 9. Leaves, magnified, of T. littor ale. 
Hurstpierpoint, February, 1868. 
H 2 
