153. T. CUNEIFOLIA. Dicks. Gregarious; st. simple; l. upper crowded oblong-lanceolate, acuminate, nerve sometimes excurrent, soft, pellucid, areolæ loose; lower broadly ovate aristate; caps. oblong erect, lid obtuse short; basilar membrane of perist. broadish: monoicous. Banks, sea coast, rare. III. IV. 154. T. MARGINATA. B. & S. St. simple gregarious or cæspitose; l. oblong-lanceolate or linear, margin thickened, nerve sometimes excurrent into a mucro; caps. oblong, lid very large, shortly rostrate; basilar membrane narrow. Sandstone walls, rare. V. VI. 155. T. VAHLIANA. Schultz. Small, gregarious or cæspitose; l. lower oblong, upper oblong wedge-shaped, nerve excurrent subulate, margin reflexed; caps. narrow elongate cylindrical, brown, sometimes slightly incurved; lid shortly subulate, annulus broad; basilar membrane of perist. tesselate: monoicous. Differs from _muralis_ in its broader softer leaves, narrower capsule, and longer basilar tube. Damp clayey ground, on road sides, &c. Spring. Sussex, 1863 (G. Davies); Woking, Surrey (Sheppard and Westell.) var. β. _subflaccida._ (_T. oblongifolia_, Bry. Brit.) L. with margins more or less revolute, crenulate, with minute papillæ. 156. T. CANESCENS. Br. Simple gregarious or cæspitose, hoary; l. lower obovate, upper oval-oblong, all concave, with a recurved margin, and nerve excurrent into a long hair-like point; caps. small oblong erect, with a long oblique conical lid; basilar membrane broadish: monoicous. Fairlight Glen, Hastings. (Mr. Jenner). 157. T. MURALIS. Timm. Short, cæspitose; l. oblong obtuse, margin recurved, nerve excurrent into a long hair-like point; caps. oblong erect, with a long rostellate lid; basilar membrane narrow: monoicous. var. β. _incana._ caps. small; l. oval-lanceolate, with long hair points. γ. _æstiva._ l. long linear-lanceolate, nerve scarcely excurrent. δ. _rupestris._ larger and much branched; l. larger oblong, piliferous, caps. longer, curved. Walls and stones (δ limestone). IV. V. SECT. III. BARBULA. L. naked, narrowly or ovate-lanceolate, in some species slightly cirrhate when dry. 158. T. MUCRONATA. Brid. [_Cinclidotus riparius_ β. _terrestris_. Bry. Brit.] St. 1–2in. radiculose, branches fastigiate; l. erecto-patent, long lingulate, concave, minutely papillose on both sides, margin slightly recurved, nerve thick excurrent into a mucro; areolæ upper minute, rectangular and hyaline at base; caps. erect cylindrical incurved, lid with an oblique beak: dioicous. Stones in streams. Anglesea, Bristol, Surrey, Sussex, in fr. (Davies.) IV. 159. T. UNGUICULATA. Hedw. St. ⅛–1in. cæspitose, dichotomous; l. oblong-lanceolate, obtuse, margin recurved, nerve excurrent into a short mucro; caps. oblong-cylindrical erect on a long reddish seta; lid with a subulate beak: dioicous. Clay banks and hedges. XII. var. β. _cuspidata._ stems shorter, l. narrower, with a longer mucro.