oval-oblong, obtuse, in a terminal spreading tuft, all simply and bluntly serrate, undulate, nerve slightly excurrent into a mucro; caps. oval, inclined or pendulous; lid with a long curved beak: synoicous.
Moist shady rocks, &c., common. IV.
341. M. riparium. Mitt. M.S. St. ½-1in., reddish below; l. orbiculate or broadly elliptical, much decurrent, apex rounded and tipped with a mucro; lower obscurely bordered, upper strongly so and simply spinuloso-dentate, nerve thin but distinct, reddish, reaching apex; areolæ large hexagonal chlorophyllose. (I have no fruited specimen.)
Watery places. Sussex (Mitten).
342. M. spinosum. Voigt. St. robust, sub-ligneous; branches flagelliform sub-arcuate; l. lower small squamiform, obtuse, margins plane; upper obovate or oblong, acuminato-spathulate, larger, crisped when dry; serration bigeminate, spinulose, nerve excurrent; caps. oval-oblong, reddish-brown, slightly inclined or horizontal; lid conical, with an obtuse beak: dioicous.
Roots of trees, and shady sub-alpine rocks. Summer.
Ben Lawers (McKinlay).
343. M. orthorhynchum. Brid. St. ¼-1in. simple; l. lower scattered ovate-acuminate, decurrent, upper ovate-lanceolate, doubly spinuloso-serrate; all undulate and crisped when dry; caps. oval or sub-pyriform horizontal; lid conical, with a blunt beak: dioicous.
Woods, shady banks, &c. Yorkshire, Sussex. Spring.
344. M. serratum. Brid. St. ½-1in. purplish, erect; l. lower reddish on nerve and border, all varying from lanceo-
