Frond simple, constricted at the middle, angular, each angle having two processes, one lateral, and in front view nearly parallel to the adjacent one of the other segment, the other superior and divergent.

The frond is simple, constricted at the middle; segments angular, as shown by the end view, each angle furnished with two elongated processes, the inferior lateral and nearly parallel to the similar one of the other segment, but the superior directed obliquely outwards and divergent.

Dolgelley, J. R. Brookhouse Moss near Congleton, Cheshire; and near Ambleside, Mr. Sidebotham. Rochdale, Mr. Coates. Brightling near Burwash, Sussex; and Weston Bogs near Southampton, Mr. Jenner.

Falaise, Brébisson. Germany, Kützing.

Frond comparatively large, rough with pearly granules, which being arranged on the processes in transverse lines, produce a crenate appearance on their margins. In the front view the processes are elongated, stout, tapering, bifid at the apex. The lateral processes of the one segment are usually parallel to those of the other; in Rochdale specimens however they are slightly curved outwards. The end view is triangular or quadrangular, and the elongated angles appear either acute and simple, or bifid, according as one or two forks of the processes may be visible.

Length of frond, including processes, 1/333 of an inch; length, excluding processes 1/547; breadth, including processes, 1/357; breadth, excluding processes, 1/555; breadth at constriction 1/1666 .

Tab. XXXIII. fig. 12. a, b. front views; c. end view of alpha ; d. transverse view of beta.