_c._ _Depressæ._ Pl. low cæspitose soft; l. broadly oblong, thinly nerved; seta smooth. * Dioicous. 470. H. (RHYNCHOSTEGIUM) DEPRESSUM. Bruch. St. prostrate pinnate; br. thickest in middle—both very short; l. complanate crowded ovate-oblong, slightly concave and finely serrulate, shortly two-nerved; caps. ovate, curved, cernuous; lid as long as caps. and long beaked. Rocks and stones, especially limestone. Spring. Caergwrle, N. Wales, Oct., 1871, in fruit (C. L. Higgins.) * * Monoicous. 471. H. (RHYNCHOSTEGIUM) CONFERTUM. Dicks. St. creeping sub-pinnate; br. erect; l. slightly secund or complanate, ovate-acuminate concave serrulate, thinly nerved quite or more than half way; caps. ovate-oblong cernuous; lid short, with a very long curved beak. Rocks, walls, trees, &c., frequent. X. 472. H. (RHYNCHOSTEGIUM) MEGAPOLITANUM. Bland. Much larger than the last, and remotely branched; st. l. remote, br. l. crowded; lower oblong-lanceolate, the others more or less sharply acuminate from a broad ovate base, slightly serrulate, nerved more than half way; caps. oblong cylindrical incurved, arcuate when dry; lid with a short thick beak. [Schp. Syn. 469, Bry. Eur. v. t. 511.] Sandy shores. Southport, Dublin, Sussex. Spring. 473. H. (RHYNCHOSTEGIUM) MURALE. Dill. St. short, creeping, with erect crowded branches; l. closely imbricate, roundish ovate, concave, faintly serrulate, cucullate at apex, which is slightly mucronate, not acuminate, nerved half way; caps. ovate, somewhat cernuous; lid flattish, with a long beak. Walls, &c., chiefly limestone. X. 474. H. (RHYNCHOSTEGIUM) RUSCIFOLIUM. Dill. St. creeping, with long irregular procumbent branches; l. complanate and sub-secund, ovate, with a cordate base, serrate, stoutly nerved nearly to apex; caps. shortly ovate cernuous; lid convex, with a very long beak. Rocks and stones in rivulets, frequent. XI. _Sub-genus_ IX. THAMNIUM. Dendroid from a creeping rhizome; l. sub-complanate, nerved, areolæ minute, quadrate or rhomboid at apex, narrowly oblong at base; caps. short and sub-arcuate with the seta, turgidly ovate, lid with a long beak; inner perist. with long appendiculate cilia. 475. H. (THAMNIUM) ALOPECURUM. Dill. St. 2–3in. naked below, pinnately branched above; l. spreading ovate-lanceolate, somewhat concave, serrate, strongly nerved nearly to apex; caps. shortly ovate, cernuous or erect, lid with a long oblique beak: dioicous. Moist woods, rocks, &c. XI. _Sub-genus_ X. PLAGIOTHECIUM. St. generally prostrate, or partially erect, branched; l. complanate or secund, thin, silky, nerveless or shortly two-nerved; areolæ long hexagono-rhomboid; caps. sub-erect or cernuous, more or less incurved; lid convexo-conical or rostrate; per. teeth pale thin, internal a membrane with narrowish processes; cilia none or obscure.