NEW BRITISH CRYPTOGAMIA. 309 
straight or slightly curved, quadrilocular, pale or dark brown, 0045 to 
005 inch long, by 001 to ‘00125 inch broad. 
This is Nylander’s Lecidea persimilis, var. scapanaria, Lich. Scand. 
p. 236; but, unless external characters are to be altogether ignored, 
and all Lecidee with triseptate spores united, it is a good species. It 
may be readily distinguished by its epiphytic habit, the absence of 
thallus, and the size and colour of the spores. 
Loc. Parasitic on the stems and leaves of Scapania undulata, var. 
a. major, Nees, and S. equiloba, Nees, at Cromaglan, Killarney. 
. 5. ULoTA CALVESCENS, Wils. Habit of Ulota Bruchii, Brid. ; but 
with narrower leaves, less dilated at the base ; inner pericheetial leaves 
short, obtusate, areole minute ; capsule oblong-clavate, broadly striate, 
tapering into a long slender pedicel, not contracted below the mouth 
When old; vaginula smooth ; calyptra glossy, straw-coloured, the apex 
purple, glabrous or slightly hairy. Fruit, —June, July. 
Loc. Immature specimens found by Dr. D. Moore in 1857, and then 
referred to U. Bruchii. Growing in the forks of young oaks, Killarney 
Woods; not unfrequent in Kerry. Fruit mature, June 10th-20th. 
6. GYMNOMITRIUM CRENULATUM, Gottsche. Patches dark-brown 
or nearly black, forming extensive depressed tufts. Stems rhizomatous; 
branches arcuate, attenuate, rigid, terete, or somewhat compressed ; 
leaves dark-brown, scarcely broader than the stem, bifariously imbri- 
fated, erect, ovate, very convex, emarginate, with a broad scariose 
rder; cells minute, discrete, hexagonal, those of the margin hyaline, 
ftose-dentate. This plant, which seems to be the only Gymnomitrium 
found in Ireland, has generally been taken for a variety of G. concinna- 
um, but it is easily known by the crenulate leaves. 
oc. Mountain districts of Ireland ; on rocks near the tunnel, Cro- 
maglan. Dunkerrow and Knockavohila, Dr. Taylor. Carrantuol, 
Dr. D. Moore. Lugnaquilla, county Wicklow, and Galtymore, A. 
-Carroll ; 
...1. JUNGERMANNIA opovata, Nees. Stems ascending, clothed with 
purple rootlets ; leaves ovate or ovate-rotund, without margin, squar- 
i Ose-patent, the base saccate; involucral leaves connate with the pe- 
_Manth, the apex free; perianth as long as the involucre, clavate, 
: DU juadrangular, and with four teeth; capsule subglobose. This species 
p mpembles closely J. spherocarpa, Hook., and J. hyalina, Lyell. From 
an è former it may be distinguished by the vinous-coloured radicles, and 
