WILSON'S

BRYOLOGIA BRITANNICA.

THE following correction of the specific character of Tortula ruralis, in page 134. is needful.

Tortula ruralis Hedw. Leaves more or less acute and tapering into the very rough hair-points.

Abundant on sand-hills on the sea-coast, but not common in

fruit.

var. B. rupestris; smaller, leaves flattish, oblong, suberect, very obtuse; hair-points longer, less spinulose; margin recurved in the lower part, plane above.

Hab. Conway Castle, and near Bangor, on walls and rocks. In aspect, the var. B. much resembles T. lævipila; and, as Bridel suggests, may be an intermediate species, having a shorter paler peristome.

34,

265 39, add “(Tab. XXVIII.).”

“M. stricta, M. angustifolia," for "stricta angustifolia.” 7, "Funariea" for "Funariæ."

18, add "(Tab. XXIII. a. 1.).”

23, "pomiformis var. crispa" for "crispia."

45, "XXXI." for XXI."

49, "Lin." for "Lynn."

20, “longicolle" for “longicolla.”

43, "mammillatum” for “mammillatus.”

32," Wils." for "Wills."

,, 48, "preceding " for "next."

BRITISH MOSSES.

SYNOPSIS OF THE GENERA.

SECT. I. ACROCARPI.

Fruit terminal.

(Or, in a few instances, cladocarpous. See Sect. I. b. CLADO CARPI, for a separate list.)

SUBSECTION A. Capsule without a deciduous lid.

*Capsule bursting irregularly.

3. ARCHIDIUM. Capsule sessile, globose; calyptra irregularly torn in the middle; spores large; stem perennial.

4. PHASCUM. Capsule very shortly pedicellate; calyptra falling away entire; spores small; stem annual.

**Capsule bursting regularly.

1. ANDREA. Capsule opening by longitudinal slits, sessile on a stalked vaginula.

SUBSECTION B. Capsule with a deciduous lid.

DIVISION I. Peristome none. GYMNOSTOMI.

*Capsule sessile on a stalked vaginula.

2. SPHAGNUM. Capsule globose; calyptra as in ARCHIDIUM. (Cladocarpous).

B