HANDBOOK OF BRITISH HEPATIC^. 247 



branched dichotomously, of a delicate translucent 

 green, the stem broad and purple, clothed with 

 radicles of the same colour. The leaves are a line 

 or more broad, obtusely lobed, horizontal ; calyx 

 campanulate, crenate" (fig. 169). Carrington. 



Although Dr. Carrington describes the spores as 

 " covered with short spines," M. Corbiere has shown 

 that the surface of the spore is alveolate, with deep 

 hexagonal pits, 35-38/4 diam. (Revue Bryol.> 1890, 



GENUS 35. PETALOPHYLLUM, Gottsche. 



Involucre connate with the colesule. Peri- 

 anth quadrate-campanulate, mouth funnel- 

 shaped, undulate, toothed. Capsule coriaceous, 

 one-valved, split to the middle into four 

 irregular segments, pitted, lobed at the apex. 

 Elaters vague, geminate, deciduous. Codonia 

 Dumort. Comm. Bot. p. in (1822). 



Petalophyllum Ralfsii, Gottsche. 



Fronds procumbent, the midrib prominent 

 beneath, overlapping each other in a singular 

 lamellate manner (figs. 166, 167). Fruit 

 borne from the upper surface. Calyx funnel- 

 shaped, broad and toothed. Calyptra shorter. 

 Capsule spherical, bursting irregularly. Spores 

 reticulated. 



fungermannia hibernica, var. Wils. Eng. 



