132 HANDBOOK OF BRITISH HEPAT1OE. 



tinge, to nearly black. Perigonial leaves almost 

 the same, more crowded and imbricate, either entire 

 or slightly crenate. Calyx narrow at the base, 

 attenuate and cylindrical, compressed and incurved 

 towards the mouth, which is truncate and entire. 

 Capsule deep brown. Elaters bispiral. 



Scapania irrigua, M, Dum. 



Creeping, leaves deeply and unequally con- 

 duplicate, two-lobed, lobes rounded, some- 

 what mucronate, anterior twice as small, 

 incurved at the apex, perichaetial leaves bifid, 

 lobes equal. 



Jungermannia irrigua, Nees Eur. Leb. I., 

 p. 193. Scapania irrigua, Dumort. Rev. Jung. 

 p. 15; Gott. and Rab. Exs. 317,332, 383, 392, 

 454 57 5 Carr. and Pears. Exs. 93. 



Mixed with mosses. 



Stems creeping, leaves repand, rather rigid, 

 deeply and unequally bilobate, lobes rounded 

 and somewhat mucronate, the ventral adpressed ; 

 the dorsal twice smaller, convex, incurved at the 

 apex. Involucral leaves bifid, lobes nearly 

 equal, denticulate ; perianth ovate, compressedly 

 angular, mouth denticulate. (Plate 3, fig. 36.) 



Scapania umbrosa, Schr. y 



Stem somewhat erect, branched, leaves un- 

 equally conduplicate, two-lobed, lobes acute, 

 serrate, the larger ovate, strap-shaped, the 

 smaller ovate. Perianth with an entire mouth. 



