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 183. De Not. St. 1in. cæspitose; l. squarrose, lanceolate, recurved, with a broad sheathing base, margin undulate, with large diaphanous cells, somewhat serrulate at apex; nerve scarcely excurrent; capsule sub-cylindrical, narrow, slightly curved; lid conical, half as long as capsule; seta 1in. long: dioicous.

Chalk. Ireland and S. of England; fr. not known in this country.

28. CINCLIDOTUS. B. & S.

[ Walker Arnott. Acrocarpous; branches fasciculate; "l. spreading oblong-lanceolate, obtuse, with thickened margins, very shortly mucronate, nerve excurrent; caps. exserted on a short thick pedicel, elliptic oblong; lid obliquely conico-rostrate; perist. with numerous subdivisions."] Bry. Brit. 138.

Not found in Britain, but

var. β. terrestris has been frequently found, and is now referred to Tortula mucronata, to which refer.

184. P. Beauv. Cladocarpous; st. 2-5in., in long straggling tufts, generally floating; l. crowded, spreading, flexuose, lanceolate, acute, with a thickened margin and strong excurrent nerve; per. l. larger sheathing ovate-lanceolate, thinner; cap. immersed, with a conical beaked lid; calyp. persistent, thick, split on one side.

Stones in rivulets, &c.

29. ENCALYPTA. Schreb.

a. Monoicous.

1. Peristome wanting.

185. E. commutata. N. & H. Stems about 1in.